A particle just clears a wall of height $$b$$ at distance $$a$$ and strikes the ground at a distance $$c$$ from the point of projection. The angle of projection is

A

$$\tan^{-1} \frac{b}{ac}$$

B

$$45^\circ$$

C

$$\tan^{-1} \frac{bc}{a(c-a)}$$

D

$$\tan^{-1} \frac{bc}{a}$$