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 ?

A. Q IS THE FATHER OF P.

(i) In a family of six persons A, B, C, D, E and F, there are two married couples.
(ii) D is grandmother of A and mother of B.
(iii) C is wife of B and mother of F.
(iv) F is the grand daughter of E.

Who among the following is one of the couples ?

B. DE

A word arrangement machine, when given an input line of words, rearranges them following a particular rule in each step. The following is an illustration of input and the steps rearrangement. 
Input :- Go for to Though By easy To Access at
Step I :- Access Go for th Though By easy To at
Step II :- Access at Go for to Though By easy To
Step III :- Access at By Go for to Though easy To
Step IV :- Access at By easy Go for to Though To
Step V :- Access at By easy for Go to Though To
Step VI :- Access at By easy for Go Though to To
Step VII :- Access at By easy for Go Though To to (and Step VII is the last step for this input)
As per the rules followed in the above steps, find out in the given questions the appropriate step for the given input. The Step II of an input is as follows :
and Do pet to on that
Which of the following would definitely be the input ?

E. NONE OF THESE

There are six persons A, B, C, D, E and F in a school. Each of the teachers teaches two subjects, one compulsory subject and the other optional subject. D's optional subject was History while three others have it as compulsory subject. E and F have Physics as one of their subjects. F's compulsory subject is Mathematics which is an optional subject of both C and E. History and English are A's subjects but in terms of compulsory and optional subjects, they are just reverse of those of D's. Chemistry is an optional subject of only one of them. The only female teacher in the school has English as her compulsory subject. Which of the following groups has History as the compulsory subject ?

D. A, B, C

Five plays A, B, C, D and E are to be staged from Monday to Friday of a week. On a each day, only one play will be staged. D or E should not be either the first or last to be staged. E should be immediately followed by C. B should be staged immediately after D. One play is staged between A and B. Which play was staged on Wednesday ?

B. B