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

Question

( A ) $\tan^{-1} \frac{bc}{a}$
( B ) $\tan^{-1} \frac{bc}{a(c-a)}$
( C ) $\tan^{-1} \frac{b}{ac}$
( D ) $45^{\circ}$