Salesman, Engineer and Accountant. There are two married couples in the family. D, the Salesman is married to the Lady Teacher. The Doctor is married to the Lawyer. F, the Accountant is the son of B and brother of E. C, the Lawyer is the daughter-in-law of A. E is the unmarried Engineer. A is the grandmother of F. How is D relatef to F ?

A. GRANDFATHER

A + B means A is the daughter of B ;
A - B means A is the husband of B ;
A x B means A is the brother of B.

If P + Q - R, which of the following is true ?

A. R IS THE MOTHER OF P

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

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.