[Solved] Identify the error in this Angular observable subscription:const obs = new Observable(subscriber => { subscriber.next('data'); });obs.subscribe(data => console.log(data));obs.unsubscribe(); | Angular

Angular - RxJS and Observables Fundamentals

Identify the error in this Angular observable subscription:

const obs = new Observable(subscriber => { subscriber.next('data'); });
obs.subscribe(data => console.log(data));
obs.unsubscribe();

ASubscription must be inside subscribe callback.

BMissing subscriber.complete() call.

CObservable cannot emit string data.

DCalling unsubscribe on the observable instead of the subscription.

Step-by-Step Solution

Solution:

Step 1: Understand unsubscribe usage
unsubscribe() is a method on the subscription object returned by subscribe(), not on the observable.
Step 2: Check the code
The code calls obs.unsubscribe(), which is invalid and causes an error.
Final Answer:
Calling unsubscribe on the observable instead of the subscription. -> Option D
Quick Check:
Unsubscribe method location = D [OK]

Quick Trick: Call unsubscribe on subscription, not observable. [OK]

Common Mistakes:

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