When a carpet is beaten with a stick, dust comes out. Why does this happen?

The correct option is A

First law of motion

The inertia of an object tends to resist any change in its state of rest or state of motion. When a carpet is beaten with a stick, then it comes in motion. But, the dust particles try to resist a change in their state of rest. According to newton first law of motion, the dust particles stay in a state of rest, while the carpet moves. Hence, the dust particles come out of carpet.