The sex of A is not known. So. neither (a) nor (b) is definitely true. Clearly, D is the grandmother of A and F.
Only sun of her grandfather ? Her father; man's brother's father ? man's father.
So, man's father is her father
i.e, She is the man's sister.
M is the brother of N and B is the brother of N.
So, M is the brother of B
B is the son of C but C is not the mother of B means C is the father of B A is married 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. from the data available. the wife of E cannot be determined.
A is the father of X and Y is the sister of X. So. Y is the daughter of A.
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
A is the mother and hence female. B is the son and hence male. C is the husband and hence male.
D in the daughter and hence female. E is the brother and hence male F is the son and hence male.
So, there are four males.
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
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