When a fast moving vehicle is suddenly stopped by applying the brakes, the force that causes deceleration is exerted by the brakes.

Due to opposing force of friction

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Because action and reaction pair are never equal

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Solution

The correct option is B
Because action and reaction pair are never equal

The force exerted by brakes is an internal force for the vehicle. Internal force can not cause deceleration. The brakes' function is just to stop the rotation of the wheels.

Once the rotation of the wheels is stopped, the wheels start to slip on the road. The frictional force between the road and tyres opposes this slipping and causes deceleration. Hence, the above statement is false.

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