'P + Q' means 'P is the wife of Q', 'P - Q' means 'P is the father of Q', 'P × Q' means 'P is the daughter of Q', and 'P ÷ Q' means 'P is the son of Q'.
If S is the sister of V, which of the following equations is correct?
1
R × S ÷ T + U - V
2
S ÷ R × T + U - V
3
S × R ÷ T + U - V
4
R ÷ S × T + U - V