Concept:A central bank acts as the highest monetary authority that supervises and regulates the entire banking system of a country.
Explanation:The central bank is responsible for overseeing all commercial banks in the country.
It ensures they follow banking rules and operate safely.
Option A is correct because this supervisory role is one of its key functions.
Option B is wrong because commercial banks provide payment facilities to individuals.
Option C is wrong because stock exchanges handle the transfer of shares.
Option D is wrong because accepting private deposits is done by commercial banks, not the central bank.
Answer:A. perform supervisory role among all the banks in the country