Given below are two statements one labelled as Assertion (A) and the other as Reason (R)-
Assertion (A): Fisher's Ideal Index is geometric mean of Laspeyre's and Pasche's index.
Reason (R): Pasche Index Number adopts base year quantity.
Choose the correct answer from the options given below

A. Both (A) and (R) are true and (R) is 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

Answer: Option C