Assertion: Laboratory reagents are usually made up to a specific molarity rather than a given molality.
Reason: The volume of a liquid is more easily measured than its mass.
A. (a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. (c )If assertion is true but reason is false.
D. (d)If assertion is false but reason is true.