The main purpose of a cover letter is to:

a. Get hired for a position.

b. Be called in for an interview.

c. Let your friends know how your job search is going.

d. Obtain references from your network.

Main purpose of a cover letter is to present yourself as a suitable profile, as of the job position. This ultimately increases the chances of an interview call. Cover letter comprises of a short description of the relevant skills, and experiences, which gives first impression of a candidate, to the recruiter.

The cover letter is a part of application letter that introduces the person and to mention what position he or she is trying to applying for. The main purpose of the cover letter is to be called for an interview. The answer to this item is therefore letter B.