There are two statements marked as Assertion (A) and Reason (R). Mark your answer as per the options given below.

Assertion (A): Realisation account and revaluation account are different not the same and made for different purpose.
Reason (R): A realisation account is prepared at the time of dissolution of the firm whereas a revaluation account is made at the time of reconstitution of the firm.

Both, Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).

On dissolution of a firm, all the books of account are closed, all assets are sold and all liabilities are paid off. In order to record the sale of assets and discharge of liabilities, a nominal account is opened named realisation account.
A Revaluation Account is outlined to determine net profit or loss on revaluation of assets and liabilities and including those items that are unrecorded into books. Revaluation account is prepared at the time of admission of a new partner or in case of death or retirement of a partner.