- AStatement II alone is sufficient but Statement I alone is not
- BBoth statements together are needed (neither alone is sufficient)
- CEither statement alone is sufficient
- DStatement I alone is sufficient but Statement II alone is not
Step-by-Step Solution
From I, C is A's daughter and D is C's child, so A (a father, hence male) is D's grandfather. II only says A is a grandparent of unknown gender.
Answer: D) Statement I alone is sufficient but Statement II alone is not