Assertion (A): Camphor is used as a solvent in the determination of the molecular mass of naphthalene and anthracene.
Reason (R ): camphor has high molal elevation constant.
A. If both `(A)` and `(R )` are correct, and `(R )` is the correct explanation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If `(A)` is correct, but `(R )` is correct.