Concept:The capital market deals with long-term financial instruments, and stock is one of the main instruments traded there.
Explanation:Treasury bills and bills of exchange are short-term instruments used in the money market.
Stock represents an ownership share in a company and does not have a fixed maturity date.
Investors buy and sell stock on the stock exchange, which is part of the capital market.
The capital market is used to raise long-term funds, and stock is a common long-term security.
Therefore, from the given options, the instrument used in the capital market is stock.
Answer:C. Stock