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If a stone is to hit at a point which is at a distance \( d \) away and at a height \( h \) above the point from where the stone starts, then what is the value of initial speed \( u \) if stone is launched at an angle \( \theta \) ?
(A) \( \frac{g}{\cos \theta} \sqrt{\frac{d}{2(d \tan \theta-h)}} \)
(B) \( \frac{d}{\cos \theta} \sqrt{\frac{g}{2(d \tan \theta-h)}} \)
(C) \( \sqrt{\frac{g d^{2}}{h \cos ^{2} \theta}} \)
(D) \( \sqrt{\frac{g d^{2}}{(d-h)}} \)
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