A is the brother of B. B is the brother of C. D is the father of A. Based on these three satatements, which of the following statements cannot be definitely true ?

D. C IS THE BROTHER OF A.

C is A's father's nephew. D is A's cousin but not the brother of C.
How is D related to C ?

B. SISTER

There are six persons A, B, C, D , E and F. C is the sister of F. B is the brother of E's husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group. Who is E's husband ?

C. A

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B, A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B. How is E related to D ?

C. UNCLE

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B, A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B. Which of the following is a pair of females ?

D. AD