Final answer:
In non-sterile compounding, intravenous solutions are not a general category.
Step-by-step explanation:
The correct answer is c) Intravenous solutions.
Non-sterile compounding refers to the preparation of medications that are not intended to be sterile, meaning they do not undergo a sterilization process to remove all microorganisms. The general categories of non-sterile compounding include capsules, ointments, and suspensions. Intravenous solutions, on the other hand, fall under the category of sterile compounding, as they need to be free from microorganisms to ensure patient safety.