A plane flying horizontally at a height of 1500 m with a velocity of \[200\text{ m}{{\text{s}}^{-1}}\] passes directly overhead on antiaircraft gun. Then the angle with the horizontal at which the gun should be fired from the shell with a muzzle velocity of 400 \[\text{m}{{\text{s}}^{-1}}\]to hit the plane, is

• A. \[90{}^\circ \,\]
• B.                    \[60{}^\circ \]
• C. \[30{}^\circ \]              
• D.        \[45{}^\circ \]