Direction: Read the following information carefully to answer these questions.
If ‘A + B’ means ‘A is brother of B;
‘A - B’ means ‘A is sister of B’,
‘A * B’ means ‘A is father of B’,
‘A ÷ B’ means ‘A is mother of B’,
Which of the following expressions represents P is mother of S?1
R - P + Q - S
2
R - P ÷ Q - S
3
R + P * Q + S
4
R - P * Q - S