Two stones are projected from the top of a cliff $h$ metres high, with the same speed $u$ so as to hit the ground at the same spot. If one of the stones is projected horizontally and the other is projected at an angle $\theta$ to the horizontal, then $\tan \theta$ equals :

Question

( A ) $u \sqrt{\frac{2}{gh}}$
( B ) $2h \sqrt{\frac{u}{g}}$
( C ) $\sqrt{\frac{2u}{gh}}$
( D ) $2u \sqrt{\frac{2}{gh}}$