In a Central bank, auditing is an activities that is not an operations activity. The Option A is correct.
The central bank is mainly described as "lender of last resort", that is, it is responsible for providing its nation's economy with funds when commercial banks cannot cover a supply shortage.
Also, the Central banks are responsible for overseeing the monetary system for a nation (or group of nations), along with a wide range of other responsibilities, from overseeing monetary policy to implementing specific goals such as currency stability, low inflation, and full employment.
In current economies, to ensure stability of a country's currency, the central bank should be the regulator and authority in the banking and monetary systems.
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