Concept:When a company issues shares, the persons who apply to buy them are called subscribers.Explanation:A company invites the public to subscribe for its shares through a public issue or private placement.Anyone who makes an application to purchase these shares is known as a subscriber.A promoter forms the company, an allottee receives shares after allotment, and an underwriter guarantees the sale of shares.Since the question asks about a person who has applied to purchase shares, the correct term is subscriber.Answer:B. A subscriber