Direction: (i) A, B, C, D, E and F are 6 members of a family. They are psychologist, manager, advocate, jeweller, doctor and engineer. (ii) Doctor is the grand-father of F who is a psychologist. (iii) Manager D is married to A. (iv) C is a jeweller and is married to advocate. (v) B is the mother of F and E. (vi) There are two couples in the family. Which of the following is a couple?

• A.  AB                              
• B.  AC
• C.  AD             
• D.  Cannot be determined
• E.  None of these