(i) There is a group of six persons A, B, C, D, E and F from a family. They are Psychologist, Manager, Lawyer, Jeweller, Doctor and Engineer.
(ii) The doctor is the grandfather of F who is a Psychologist.
(iii) The manager D is married to A.
(iv) C, the Jeweller is married to the Lawyer.
(v) B is the mother of F and E.
(vi) There are two married couples in the family.
How many male members are there in the family ?