Concept:A market where previously issued securities are bought and sold is known as a secondary market.Explanation:Second-hand securities refer to shares and bonds that have already been issued to investors.The Stock Exchange provides the platform for trading these existing securities.It enables buyers and sellers to transact in the secondary market.Building societies, co-operatives, and the Shippers Council do not perform this function.Therefore, the Stock Exchange is the correct answer.Answer:A. Stock Exchange