To stop the slide of the Rupee (depreciation), the RBI/Government needs to increase the inflow of foreign currency (USD) or decrease the outflow.

Option (a), (b), and (c) are likely measures: They either increase the supply of dollars in the Indian market or reduce the demand for dollars, which helps stabilize the Rupee.

Option (d) is NOT a likely measure: An expansionary monetary policy usually involves lowering interest rates. When interest rates fall, the "carry trade" becomes less attractive to foreign investors, leading to capital flight. This increases the supply of Rupee in the market and decreases its value further. To stop a slide, the RBI typically follows a contractionary (dear money) policy to attract capital and curb inflation.