LangChain's OpenAI class uses 'streaming=True' and 'callbacks' as a list of handlers.
Step 2: Check each option's syntax
llm = OpenAI(streaming=True, callbacks=[MyCallbackHandler()]) correctly uses streaming=True and callbacks as a list. Others misuse parameter names or types.
Final Answer:
llm = OpenAI(streaming=True, callbacks=[MyCallbackHandler()]) -> Option A