Option 1 -> Central bank intervenes occasionally in market-determined rates.
Option 2 -> Exchange rate determined purely by market forces without intervention.
Option 3 -> Exchange rate pegged at a fixed level requiring constant intervention.
Option 4 -> Buying/selling government securities to control money supply, not foreign exchange.
Hence, Managed Floating exchange rate -> This system, also known as 'dirty float,' allows the exchange rate to be primarily determined by market forces of supply and demand, but the central bank intervenes periodically by buying or selling foreign currencies to prevent excessive fluctuations or to guide the rate toward desired levels. This combines elements of both fixed and flexible exchange rate systems, providing stability while maintaining some market flexibility.-> correct