In a certain code language,
'A + B' means 'A is the father of B',
'A ÷ B' means 'A is the daughter of B'
Based on this information, which of the following is true if 'P ÷ R + Q'?
1
P is the mother of Q
2
Q is the sister of P
3
Q is the brother of P
4
P is the sister of Q