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Relationship Chain

Introduction

Relationship Chain समस्याओं में कई लोग parent, sibling, spouse आदि संबंधों की एक श्रृंखला द्वारा जोड़े होते हैं। आपको अंतिम दिए गए दो व्यक्तियों के बीच का संबंध जानने के लिए इस chain को link-by-link फॉलो करना होता है।

यह pattern इसलिए महत्वपूर्ण है क्योंकि असली परीक्षात्मक प्रश्न अक्सर एक ही कथन में कई links भर देते हैं - chain-tracing में माहिर होने से समय बचता है और गलती कम होती है।

Pattern: Relationship Chain

Pattern

मुख्य विचार: प्रत्येक clause को एक संक्षिप्त संबंध में ट्रांसलेट करें, एक निर्देशित chain या mini-tree बनाइए, और फिर source से target तक step-by-step ट्रावर्स कीजिए।

Workflow: Parse → Translate → Draw/Map → Traverse → Verify.

Step-by-Step Example

Question

A is the father of B. B is the sister of C. C is the mother of D. How is A related to D?
(A) Grandfather (B) Uncle (C) Grandmother (D) Cannot be determined

Solution

  1. Step 1: प्रत्येक clause को पार्स करें।

    A → B का पिता। B → C की बहन (इसलिए B और C siblings हैं; B महिला है)। C → D की माँ (इसलिए C महिला है और D की माता है)।

  2. Step 2: एक छोटा family map में ट्रांसलेट करें।

    A (male) → B का parent. B (female) ↔ C की sibling. C (female) → D का parent.

  3. Step 3: A से D तक ट्रैवर्स करें।

    A B का parent है → B C की sibling है → C D की parent है. इसलिए A C का parent भी है (क्योंकि siblings का parent सामान्य होता है) और अतः A D का दादा/नाना होगा।

  4. Final Answer:

    Grandfather → Option A.

  5. Quick Check:

    यदि B और C siblings हैं और A B का पिता है, तो A C का भी पिता है → D की माँ का पिता = दादा/नाना ✅

Quick Variations

1. chains में spouse और blood relations दोनों मिल सकते हैं (उदा., "P is husband of Q; Q is sister of R; R is mother of S").

2. chains जिनमें generation skips हों (उदा., "A is grandfather of B; B is father of C").

3. circular या reciprocal statements जिनमें consistency चेक करना ज़रूरी होता है।

4. symbolic codes को chain के साथ मिलाकर दिया जा सकता है (पहले codes को convert करें, फिर chain बनाएं)।

Trick to Always Use

  • Step 1 → हर relation को एक short phrase में लिखें (उदा., "A → father of B").
  • Step 2 → एक quick tree बनाइए जहाँ generation ऊपर हों और siblings side-by-side हों।
  • Step 3 → हर link पर direction और gender चेक करें; यदि gender अज्ञात है और विकल्प gender-specific हैं तो "Cannot be determined" चुनें।
  • Step 4 → अपना परिणाम verify करने के लिए target से backward पढ़कर भी चेक करें।

Summary

Summary

  • हमेशा पहले parse और translate करें, फिर ही relations को जोड़ें।
  • multi-link chains स्पष्ट रूप से दिखाने के लिए mini-diagram का प्रयोग करें।
  • हर link पर gender logic सावधानी से लागू करें।
  • अंतिम उत्तर की पुष्टि के लिए chain को पीछे से भी पढ़ें।

याद रखने के लिए उदाहरण:
यदि A is father of B, B sister of C, और C mother of D → A D का दादा/नाना है।

Practice

(1/5)
1. A is the father of B. B is the sister of C. C is the father of D. How is A related to D?
easy
A. Grandfather
B. Father
C. Uncle
D. Cannot be determined

Solution

  1. Step 1: Decode each relation.

    A → father of B; B → sister of C; C → father of D.

  2. Step 2: Connect the chain.

    A → father of B (female) and C (male); C → father of D → A is father of D’s father.

  3. Step 3: Identify generation and gender.

    A → two generations above D and male → grandfather.

  4. Final Answer:

    Grandfather → Option A.

  5. Quick Check:

    Father of father = grandfather ✅
Hint: Father of father = grandfather.
Common Mistakes: Confusing father with grandfather.
2. P is the mother of Q. Q is the brother of R. R is the father of S. How is P related to S?
easy
A. Mother
B. Grandmother
C. Aunt
D. Cannot be determined

Solution

  1. Step 1: Decode relationships.

    P → mother of Q; Q → brother of R; R → father of S.

  2. Step 2: Link them together.

    P → parent of Q and R; R → parent of S → P → grandparent of S.

  3. Step 3: Apply gender logic.

    P is female → grandmother.

  4. Final Answer:

    Grandmother → Option B.

  5. Quick Check:

    Mother of father = grandmother ✅
Hint: Mother of father/mother = grandmother.
Common Mistakes: Selecting mother instead of grandmother.
3. X is the son of Y. Y is the sister of Z. Z is the mother of W. How is X related to W?
easy
A. Uncle
B. Cousin
C. Brother
D. Cannot be determined

Solution

  1. Step 1: Decode the chain.

    X → son of Y; Y → sister of Z; Z → mother of W.

  2. Step 2: Connect the relationships.

    Y and Z are sisters → X is child of Y; W is child of Z → both are children of sisters.

  3. Step 3: Determine generation and gender.

    X and W are in the same generation; X is male → cousin brother → cousin.

  4. Final Answer:

    Cousin → Option B.

  5. Quick Check:

    Children of sisters are cousins ✅
Hint: Children of sisters (or brothers) are cousins.
Common Mistakes: Assuming one generation difference and selecting uncle.
4. L is the brother of M. M is the father of N. N is the sister of O. How is L related to O?
medium
A. Uncle
B. Brother
C. Father
D. Grandfather

Solution

  1. Step 1: Decode statements.

    L → brother of M; M → father of N; N → sister of O.

  2. Step 2: Connect generations.

    L and M are same generation (brothers); M is father of O’s sibling (N) → L is father’s brother → uncle.

  3. Step 3: Gender logic.

    L male → uncle.

  4. Final Answer:

    Uncle → Option A.

  5. Quick Check:

    Father’s brother = uncle ✅
Hint: Brother of father = uncle.
Common Mistakes: Selecting brother instead of uncle.
5. R is the wife of S. S is the brother of T. T is the father of U. How is R related to U?
medium
A. Mother
B. Aunt
C. Sister
D. Grandmother

Solution

  1. Step 1: Decode each link.

    R → wife of S; S → brother of T; T → father of U.

  2. Step 2: Connect the relations.

    R is wife of T’s brother → R is aunt of U.

  3. Step 3: Confirm generation.

    R is one generation above U → aunt.

  4. Final Answer:

    Aunt → Option B.

  5. Quick Check:

    Wife of father’s brother = aunt ✅
Hint: Wife of father’s brother = aunt.
Common Mistakes: Choosing grandmother instead of aunt.

Mock Test

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