The RBI is responsible for formulating and administering monetary policy in India. Monetary policy uses various tools at the central bank's disposal to influence money supply and credit in order to regulate aggregate demand. These tools include bank rate, repo rate, open market operations, cash reserve ratio, selective credit control, and moral suasion. While RBI has used various instruments for credit control, their effectiveness has been limited due to factors such as other sources of funding for banks, lack of coordination between monetary and fiscal policy, and the existence of a parallel economy. Monetary policy is most effective when coordinated closely with fiscal policy.