Explanation:

• Open Market Operations (OMO): OMOs are conducted by the RBI by way of sale or purchase of government securities (g-secs) to adjust money supply conditions.The central bank sells g-secs to commercial banks to remove liquidity from the system and buys back g-secs to infuse liquidity into the system.
• Cash Reserve Ratio (CRR): Banks are required to hold a certain proportion of their deposits in the form of cash. This minimum ratio (that is the part of the total deposits to be held as cash) is stipulated by the RBI and is known as the CRR. It is one of the main components of the RBI's monetary policy, which is used to regulate the money supply, level of inflation and liquidity in the country. The higher the CRR, the lower is the liquidity with the banks and vice-versa. Increasing the CRR requirement will decrease liquidity.
• Long Term Reverse Repo Operation (LTRO): It is a mechanism to facilitate the transmission of monetary policy actions and the flow of credit to the economy. This helps in injecting liquidity in the system. Funds through LTRO are provided at the repo rate. This means that banks can avail one year and three-year loans at the same interest rate of one day repo. But usually, loans with higher maturity period (here like 1 year and 3 years) will have a higher interest rate compared to short term (repo) loans.
• Repo Rate: It is the rate at which the central bank of a country lends money to commercial banks in the event of any shortfall of funds. Low repo rates encourage banks to borrow from the RBI, allowing them to lend more. This adds liquidity in the economy.

Hence option 3rd is correct.