Q. Examine the following relationships among members of a family of six persons A,B,C,D,E and F:1. The number of males equals that of females.2. A and E are sons of F.3. D is the member of two,one  boy and one girls.4. B is the son of A.5. There is only one married couple in the family at present.Which one of the following infereces can be drawn from the above ? 

1. A,B and C are all females
2. A is the husband of D
3. E and F are children of D
4. D is the granddaughter of F