Which of the following is definitely a group of male members?
B, F, E
B, F, A
None of these
D is the grandmother of E and is a housewife. So F who is a lawyer and grandfather of C must be married to D. Thus C and E must be brother or sister and be the two students. B who is an engineer and father of E will be father of C as well and must be married to A, who will be the only teacher in the family.