JEE Main Physics question

A boy of mass 0.25 kg is projected with muzzle velocity 100 ms⁻¹ from a tank of mass 100 kg. What is the recoil velocity of the tank?

• (A)5 ms⁻¹
• (B)25 ms⁻¹
• (C)0.5 ms⁻¹
• (D)0.25 ms⁻¹Correct