Direction: (i) A, B, C, D, E and F are 6 members of a family. (ii) One of them is doctor, one advocate, one engineer, two students and one housewife. (iii) There are two couples in the family. (iv) F is the father of E and is a doctor. (v) A is a girl student and her husband is not an advocate. (vi) B is the grandmother of D and is a housewife. (vii) D is the sister of E. Which of the following is a couple?

• A.  F, B                            
• B.  F, A       
• C.  C, F                            
• D.  F, D
• E.  None of these