Select the correct pair of reasons for the following statements.
Critical velocity of liquid decreases when:

Options

A. Density of liquid increases and diameter of the pipe increases
B. Density of liquid decreases and diameter of the pipe increases.
C. Volume of liquid decreases and diameter of the pipe decreases.
D. Velocity of liquid decreases and radius of the pipe increases.

Answer

A

Explanation

Critical velocity `v_(c)=(R_(c)eta)/(rhoD)`
Hence critical velocity decreases when density of liquid increases and diameter of the pipe increases.