Money performs four key functions in a modern economy. Which of the following correctly lists all four functions of money?

Money performs four classical functions: (1) Medium of Exchange — money eliminates the need for a double coincidence of wants (barter problem) by acting as an intermediary in transactions; (2) Store of Value — money allows purchasing power to be saved and transferred to the future (though inflation erodes this function); (3) Unit of Account — money provides a common measure for pricing goods, services, assets, and debts, enabling comparison and bookkeeping; and (4) Standard of Deferred Payment — money allows debts to be stated and settled in future terms, enabling credit transactions. These four functions underpin the role of money as the foundation of a modern market economy. Without money, specialisation and trade at scale would be impossible.