UPSC CSE Prelims 2000 Q135 — Science & Technology PYQ with Answer

Examine the following relationships among members of a family of six persons A, B, C, D, E and F.

I. The number of males equals that of females.

II. A and E are sons of F.

III. D is the mother of two, one boy and one girl.

IV. B is the son of A.

V. There is only one married couple in the family at present.

Which one of the following inferences can be drawn from the above?