A body is projected at such angle that the horizontal range is three times the greatest height. The angle of projection is :

• A

  ${\tan }^{-1}\left(\frac{3}{4}\right)$

• B

  ${60}^{\circ }$

• C

  ${\tan }^{-1}\left(\frac{4}{3}\right)$

• D

  ${45}^{\circ }$