If K $$\div$$ L means that K is the mother of L, K - L means that K is the father of L, K $$\times$$ L means that K is the sister of L, then which of the following expression shows that P is the paternal grandmother of R?

A

$$P \div Q \times R$$

B

$$R - Q \div P$$

C

$$P \div Q - R$$

D

$$Q \div P - R$$