Direction: Read the information given below and answer the question that follow.
(i) In a family of six persons A, B, C, D, E and F, there are two married couples.
(ii) D is grandmother of A and mother of B.
(iii) C is wife of B and mother of F.
(iv) F is the grand daughter of E.
Who among the following is one of the couples?
(D) None of these