If L × M means that L is the mother of M, L + M means that L is the father of M, and L ÷ M means that L is the sister of M, then which of the following expression shows that P is the father of R?
1
P + Q ÷ R
2
P ÷ R + Q
3
Q + P ÷ R
4
P + Q × R
If L × M means that L is the mother of M, L + M means that L is the father of M, and L ÷ M means that L is the sister of M, then which of the following expression shows that P is the father of R?