Directions: Study the following information carefully to answer the given questions:

In a family there are seven persons and four generations. A is married to the only daughter of D who is the only son of Q. E is the brother in law of A who has only one child. C is the grandson of M who is the mother of A. D has only two children. Q is a female member of the family. B is one of the members of the family. A has no siblings.