A body is sliding down an inclined plane having coefficient of friction 1/3. If the normal reaction is three times that of the resultant downward force along the inclined plane, the angle between the inclined plane and the horizontal is

• A

  ${\tan }^{-1}\left[\frac{1}{2}\right]$

• B

  ${\tan }^{-1}\left(2\right)$

• C

  ${\tan }^{-1}\left(\frac{2}{3}\right)$

• D

  ${\tan }^{-1}\left(\frac{3}{2}\right)$