Assertion: Liquids and gases are largely incompressible and densities are therefore, nearly constant at all pressure.
Reason: Liquids exhibit a large variation in densities with pressure by gases do not.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true and reason is false.
D. If both assertion and reason are false.