A body of mass m₁ moving with a velocity 3m/s collides with another body at rest of mass m₂. After collision the velocities of the two bodies are 2 m/s and 5 m/s, respectively, along the direction of motion of m₁. The ratio m₁/m₂ is
A. 15
B. 5
C. 12/5
D. 5/12
