Examine the following relationship among members of a family of six person—A, B, C, D, E and F. 1.The number of males equals that of females. 12.A and E are sons of F. 3.D is the mother of two, one boy and one girl. 4.B is the son of

The correct answer is D.

Explanation:

1. The number of males equals that of females.
   This means that there are 3 males and 3 females in the family.

2. A and E are sons of F.
   This means that A and E are males.

3. D is the mother of two, one boy and one girl.
   This means that D is a female and has two children, one male and one female.

4. B is the son of A.
   This means that B is a male and is the son of A.

5. There is one married couple in the family at present.
   This means that there are two people in the family who are married to each other.

Based on the above information, we can infer that E and F are children of D. This is because D is a female who has two children, one male and one female. The only two people in the family who are married to each other are A and D. Therefore, E and F must be the children of A and D.

A. A, B and C are all females.
This is not possible because we know that B is a male.

B. A is the husband of D.
This is not possible because we know that A is the son of D.

C. D is the grand daughter of F.
This is not possible because we know that D is the mother of A and E.

D. E and F are children of D.
This is the only option that is consistent with all of the information given in the question.