Concept:Understanding the main regulator of share trading in Nigeria.
Explanation:The Nigerian Stock Exchange provides the platform for buying and selling shares, but it is not the regulator.
The Corporate Affairs Commission registers companies and does not regulate share transactions.
The Securities and Exchange Commission (SEC) is the apex regulatory body of the Nigerian capital market.
Under the Investments and Securities Act, SEC oversees, licenses, and supervises all market operators.
It enforces rules for fair, transparent, and orderly sale and purchase of shares.
SEC also protects investors and maintains the integrity of the market.
Therefore, the body regulating the sale and purchase of shares in Nigeria is the Securities and Exchange Commission.
Answer:B. Securities and exchange commission.