A car containing a beaker of water is moving horizontally on a level road. Consider two points, A & B, inside the water such that they are on the same horizontal level and are separated by a distance L. Which of the following options is correct regarding the pressure differences between those two points?
(a) If car is accelerating with acceleration a, PA – PB = ρgL
(b) If car is accelerating with acceleration a, PA – PB = 0
(c) If car is moving with constant velocity, PA – PB = 0
(d) If car is moving with constant acceleration a, PA – PB = ρ (g+a)L