Which of the following is not one of the five parts of a complaint?

A complaint typically consists of several distinct parts that serve different purposes in the legal document. The five recognized parts include the caption, which provides the title of the case and identifies the parties involved; the prayer, which outlines the specific relief or remedies sought by the plaintiff; the opening paragraphs, which set the stage for the allegations and provide background context for the case; and the body, which contains the specific claims and legal grounds.

Discovery, on the other hand, refers to the pre-trial process where parties exchange information and gather evidence relevant to the case. It is an essential component of civil litigation but is not a part of the complaint itself. The function of discovery occurs after the complaint has been filed and serves to facilitate the preparation for trial. Therefore, it is clear that discovery does not fit within the structure of a complaint, making it the correct answer to the question.