A team of five is to be selected from amongst five boys A, B, C, D and E and four girls P, Q, R and S. Some criteria for selecation are : A and S have to be together. P cannot be put with R. D and Q cannot be together. C and E have to be together. R cannot be put with B. Unless otherwise stated, these criteria are applicable to all the question below :
If two of the members are girls and D is one of the members, the members of the team other than D are :
A + B means A is the son of B; A - B means A is the wife of B; A x B means A is the brother of B; A ÷ B means A is the mother of B; and A = B means A is the sister of B. What does P + R - Q mean ?