The correct answer is: B. capital market
A new issue market is a market for the initial sale of securities by a company. It is an integral part of the capital market, which is a market for long-term financial instruments, such as stocks, bonds, and mortgages. The capital market provides companies with a way to raise money to finance their operations and growth.
A stock exchange is a marketplace where shares of companies are bought and sold. It is not an integral part of the new issue market, as companies can raise money through private placements or through initial public offerings (IPOs) that are not listed on a stock exchange.
Discount houses are financial institutions that specialize in buying and selling securities at a discount. They are not an integral part of the new issue market, as they do not provide a market for the initial sale of securities.