A is the brother of B, who is the sister of C. A, B and C are the children of E and F. How is F related to B?
Which of the below information is additionally required to answer the above question?1
C is the son of F.
2
E is the father of A.
3
E and F have 1 son and 2 daughters.
4
E and F have 2 sons and 1 daughter.