'P + Q' means 'P' is the father of 'Q'.
'P × Q' means 'P' is the sister of 'Q'.
'P $ Q' means 'P' is the wife of 'Q'
'P % Q' means 'P' is the mother of 'Q'.
'P' ÷ Q' means 'P' is the son of 'Q'.
Which of the following expression shows that P is the father of W?
1
O % N $ P + S × W
2
O + W $ P + S × N
3
W ÷ S + P % N % O
4
P + O $ N + W × S