- AStatement I alone is sufficient but Statement II alone is not
- BEither statement alone is sufficient
- CStatement II alone is sufficient but Statement I alone is not
- DBoth statements together are needed (neither alone is sufficient)
Step-by-Step Solution
From I, M is male and shares N's father, so M is N's brother. From II, N is M's sister but M's own gender is unknown, so M could be brother or sister — not fixed.
Answer: A) Statement I alone is sufficient but Statement II alone is not