JEE Main Physics question

A body of mass 10 is moving with a constant velocity of 10 . When a constant force acts for 4 seconds on it, it moves with a velocity 2 in the opposite direction. The acceleration produced in it is [MP PET 1997]

• (A)3 m/sec
• (B) m/secCorrect
• (C)0.3 m/sec
• (D) m/sec