Directions: Answer the following questions from given information?s. 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 brother and a mother in the group. Which of the following is a group of brothers?

• A.  ABF  
• B.  ABD   
• C.  4
• D.  BDF