If A - B means that A is the brother of B, A + B means that A is the sister of B, A $$\div$$ B means that A is the father of B then which of the following expression shows that P is the paternal uncle of R?

A

$$P + Q \div R$$

B

$$P \div Q - R$$

C

$$P - Q \div R$$

D

$$P - Q + R$$