The correct option is B It is pegged at a certain level by the central bank
In a fixed rate system, the price of the domestic currency in international markets is purely determined by the central bank of the country. It is pegged bilaterally and is artificially maintained at that level by the central bank. It is not allowed to appreciate and depreciate as per the market conditions, the central bank will intervene using forex reserves and hold the exchange rate at the pegged amount.