if A is the sister of B.C is the brother of D.D is the sister of A. how is B related to D Share with your friends Share 0 Roshini Anie Thomas answered this D is the brother 0 View Full Answer Mahima Diwan answered this brothers -1 Vaaruni answered this D's sister or brother (all of them are brothers and sisters 2 Shambhavi Swarupa answered this Than B is the sister/brother of D 1 Sharan Pranav answered this B is brother or sister of D 0