If A + B means A is the sister of B; A - B means A is the brother of B; A x B means A is the daughter of B, Which of the following shows the relation that E is the maternal uncle of D ?
(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.