A is brother of B; C is the daughter of B. E is the sister of A.  B is the sister of E.  D is the brother of C. Who is the uncle of D?

B C E A

A

According to question C is female, E and B is also female. Only D and A are male; and also from the chart it can be conclued that A is the uncle of D Here, O → stands for female | → different generation — → same  generation