Option 1: Decrease -> During deficient demand, the economy faces a situation where aggregate demand falls short of aggregate supply at full employment level, leading to unemployment and deflation. To combat this, RBI adopts an expansionary monetary policy. One key tool is reducing the margin requirement (or Loan-to-Value ratio). The margin is the difference between the value of collateral/securities and the loan amount sanctioned by banks. When RBI decreases the margin, banks can lend a larger amount against the same collateral. For example, if margin is reduced from 40% to 20%, a bank can now lend ₹80 instead of ₹60 against a ₹100 collateral. This increases credit availability in the market, boosts money supply, stimulates investment and consumption, and ultimately helps increase aggregate demand to correct the deficiency. -> correct