Which technique provides a smooth transition from acceleration to braking?

Cover-braking technique

Explanation:

Cover braking involves the technique of taking off the foot from the accelerator and hovering it over the braking pedal. The foot must not be placed on the braking pedal to avoid the wear of brake unnecessarily.

It is done usually when an obstacle is expected in front of the moving car. This provides an edge in the reaction time of application of the brakes hence reducing the stopping time.

what was the answer?

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle