If P Is a Pressure, ñ Density, G Gravitational Acceleration

Multiple Choice

If P is a pressure, ñ density, g gravitational acceleration, and h height (or depth) of a fluid, where is the relationship P = ñgh applicable?

A) only in liquids
B) only in gases
C) only in gases of uniform density (ideal gases)
D) in any type of fluid with uniform density (ideal fluid)