USP chapter <797> applies to:

USP chapter <797> is a set of guidelines that applies to sterile product preparation. This includes preparing, handling, and administering medications or compounds in a way that minimizes the risk of contamination from microorganisms. It is necessary to follow these guidelines in order to maintain the safety and efficacy of medications for patients. Options B, C, and D are incorrect because they do not involve sterile product preparation and therefore do not fall under the scope of USP chapter <797>. Non-sterile product preparation, bulk drug substances, and over-the-counter medications do not require the same level of sterility control and therefore do not fall under this specific chapter.