The correct answer is (A) Increase
Explanation- At the earth's surface, the air pressure exerted on us is a result of the air above us. This air pressure is reduced as we go up in altitudes and the weight of air decreases.
If we go below the water or in a depth, the total pressure being exerted upon us will be the sum of air pressure and the weight of water above us so we can say that the pressure will increase on scuba diver.