What does A × C ÷ B mean?

Who is sitting exactly in the middle of the arrangement?

How is 'R' related to 'S'?

Who lives to the immediate right of E’s house?

'A' and 'B' is a couple. 'B' is the sister of 'C'.'D' is the father of 'C'. How is 'D' related to 'A'?

How is my wife’s mother’s brother related to me?

How is 'K' related to 'P'?

Who among the following likes grapes?

Who is sitting at the extreme left of the arrangement?

Who is standing exactly in the middle of the row?