$$PA$$ and $$PB$$ are two tangents from a point $$P$$ outside the circle with centre $$O$$. If $$A$$ and $$B$$ are points on the circle such that $$\angle APB = 110^\circ$$, then $$\angle OAB$$ is equal to:

A

$$45^\circ$$

B

$$55^\circ$$

C

$$35^\circ$$

D

$$70^\circ$$