Answer:
a. When stock in a closely held corporation is offered to the public for the first time, the transaction is called "going public or an IPO", and the market for such stock is the secondary market.
Step-by-step explanation:
When the stock of a company is issued for the first time as an Initial Public Offer, even if it is a closely held company, it is a primary market transaction.
A primary market transaction is the one which raises funds for the company, from the market. Whereas the secondary market transaction is the one, where already existing securities are dealt with.
Thus, since IPO is the first issue of securities to public it is a primary market transaction.