JEE Main 2019 Physics question

A bullet of mass 20 g has an initial speed of 1 ms, just before it starts penetrating a mud wall of thickness 20 cm. If the wall offers a mean resistance of N, the speed of the bullet after emerging from the other side of the wall is close to:

• (A)0.3 ms
• (B)0.1 ms
• (C)0.7 msCorrect
• (D)0.4 ms