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How are medications classified?

  1. a. By color

  2. b. By brand name

  3. c. By side effects

  4. d. By how they are administered

The correct answer is: d. By how they are administered

Medications are typically classified based on how they are administered, which is often indicated by different routes of administration (e.g. oral, topical, intravenous). Classifying medications by color or brand name may help with identification, but it is not a standard classification system. Similarly, categorizing medications by their side effects may be useful for certain purposes, but it is not a primary way in which they are typically classified. Therefore, the most accurate answer is D, by how they are administered.