Assertion (A) : Relative lowering in vapour pressure is colligative property.
Reason (A) : Relative lowering in vapour pressure depends upon mole fraction of pure solvent.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A).
B. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
C. (A) is true, but (R) is false
D. (A) is false, but (R) is true.