'$$A+B$$' means 'A is the husband of B',
'$$\frac{A}{B}$$' means 'A is the sister of B' and
'$$A\times B$$' means 'A is the son of B',

which of the following shows 'P is the daughter of Q'?
1. $$P\times S\times Q$$
2. $$S\times Q+\frac{R}{P}$$
3. $$Q+R\times P$$
4. $$R\times\frac{Q}{P}$$

A

1

B

2

C

3

D

4