|A) AE||B) BD|
|C) DF||D) AD|
Answer: D) AD
B is the son of C but C is not the mother of B means C is the father of B A is marned to C means A is the mother of B. F is brother of B means F is son of A and C. D is daughter of A means D is daughter of A and C.
Clearly, the females are only the mother A and the daughter D