Explanation:

- Bank Rate: The interest rate at which a central bank lends to commercial banks. Changing it influences borrowing costs and controls money supply.

- Moral Suasion: A qualitative method. It involves persuasion and advisory efforts by the central bank. Used to influence and guide banking activities.

- Open Market Operations: Buying and selling of government securities to regulate the money supply and influence interest rates.

- Change in CRR (Cash Reserve Ratio): A quantitative measure where the portion of deposits banks must hold as reserves is adjusted, affecting available credit.

The correct answer is Option 2, Moral Suasion as it is not a quantitative method.