Which of the following is NOT an abbreviation for drug routes?

The answer is D because "PD" is not a standard abbreviation for drug routes. In the context of medication administration, "IV" stands for intravenous, "IM" stands for intramuscular, and "SC" stands for subcutaneous. These abbreviations are commonly used in medical settings to describe the method of delivering medications. Each route has specific implications on how quickly and effectively the drug enters the bloodstream and exerts its effect.

"PD," on the other hand, does not correspond to any recognized route of administration in pharmacology. It could commonly refer to other medical terms, such as "peritoneal dialysis," but it does not serve as an abbreviation for a drug route. Recognizing the proper abbreviations for medication administration is critical for safe practice in healthcare settings.