Final answer:
A. The treasury market is not a secondary equity market, while the national exchanges, over-the-counter market, regional exchanges, and call market are all examples of secondary equity markets.
Step-by-step explanation:
An secondary equity market refers to a market where already issued securities are traded among investors, and it provides a platform where buyers and sellers can trade in stocks, bonds, and other financial instruments. Out of the options given, the treasury market is not a secondary equity market. The treasury market is where the government issues and trades its own securities, such as treasury bonds and treasury bills.
On the other hand, the national exchanges, over-the-counter market, regional exchanges, and call market are all examples of secondary equity markets. National exchanges, such as the New York Stock Exchange and NASDAQ, are regulated marketplaces where shares of listed companies are traded.
The over-the-counter market (OTC) is a decentralized market where securities are traded directly between two parties, without the need for a centralized exchange. Regional exchanges are smaller exchanges that serve specific regions or cities. Lastly, a call market is a trading system where buyers and sellers submit orders to a central location and the trades are executed at a specific time, usually at the end of a trading session.