A particle is projected with initial speed of $\mathrm{V}_{0}$ and angle of $\theta$. Find the horizontal displacement when its velocity is perpendicular to initial velocity.
(A) $\left[\left(\mathrm{V}_{0}^{2}\right) /(\operatorname{gtan} \theta)\right]$
(B) $\left[\left(\mathrm{V}_{0}^{2}\right) /(\mathrm{g} \sin \theta)\right]$
(C) $\left[\left(\mathrm{V}_{0} \sin \theta\right) / \mathrm{g}\right]$
(D) $\left[\left(\mathrm{V}_{0}^{2}\right) /(\tan \theta)\right]$