There are 2 possibilities depending upon the sex of D ie., D is either a nephew or a niece to A.
A is Bs sister. C is Bs mother. D is Cs father. E is Ds mother. Then, how is A related to D ?
s sister. C is B
s father. E is D
A is the son of B. C, B`s sister has a son D and a daughter E. F is the maternal uncle of D. How is A related to D ?
If A - B means A is the sister of B; A + B means A is the brother of B and A x B means A is the father of B then what will be the answer of "C is the son of M"?