In the context with the Indian economy, ‘Open Market Operations’ is one of the functions of the Reserve Bank of India which refers to:

The correct answer is C. Open Market Operations (OMO) are the RBI's outright purchase and sale of government securities in the open market. When the RBI sells securities, it absorbs liquidity from the banking system. When it buys, it injects liquidity. This is how it manages money supply and short-term interest conditions.

Why the others fail: Option A describes borrowing by scheduled banks from the RBI, which is refinancing through facilities like the repo window or the Marginal Standing Facility, not OMO. Option B describes ordinary credit extended by commercial banks to industry and trade, which has nothing to do with the central bank's monetary tools. Option D is wrong because C is correct.

Core concept: OMO is a quantitative instrument of monetary policy, used alongside the repo rate and the CRR and SLR. For Mains, it helps in explaining how monetary policy is transmitted to the economy and how liquidity is managed in the bond market.

Trap: Aspirants often mix OMO with the Liquidity Adjustment Facility. Both involve RBI operations, but OMO is an outright buying or selling of securities, while repo is a collateralised short-term lending arrangement.