- AStatement II alone is sufficient but Statement I alone is not
- BEither statement alone is sufficient
- CStatement I alone is sufficient but Statement II alone is not
- DBoth statements together are needed (neither alone is sufficient)
Step-by-Step Solution
I makes P the sole son of Q's mother, so P is Q's brother — sufficient. II only tells that Q is P's sister without fixing P's gender, so P could be Q's brother or sister.
Answer: C) Statement I alone is sufficient but Statement II alone is not