The pressure in a moving stream of fluid
a. is greater than the pressure in the surrounding fluid.
b. is less than the pressure in the surrounding fluid.
c. depends on the nature of the fluid.
d. depends on the volume of the fluid.

The pressure in a moving stream of fluid is less than the pressure in the surrounding fluid.

Option B

Explanation:

According to Bernoulli's theorem, a fluid moving in a streamline motion will exhibit pressure lower than the pressure in the surrounding fluid. So, if the surrounding fluid has high pressure, then the moving stream of fluid will get slow down to maintain the Bernoulli's equation which state that pressure, speed and height of any points at a steady streamline flow tends to be constant in all the points of the pipe. The position of the points along with pressure at its previous points may change depending upon the viscosity of the fluid.