'Z × Y' means Z is the daughter of Y.
'Z + Y' means Z is the husband of Y.
'Z - Y' means Z is the sister of Y.
Which of the following options is correct according to 'R + P - O × Q'?
1
R is the brother-in-law of Q
2
R is the uncle of P
3
R is the brother-in-law of O
4
Q is the mother-in-law of R