## **Core Concept**
The question tests knowledge of specific drug delivery methods, particularly subdermal administration. Subdermal or subcutaneous administration involves injecting medication under the skin, but not into the muscle or vein. This method allows for slow absorption of the drug.

## **Why the Correct Answer is Right**
The correct answer, , refers to a drug that can be administered subdermally. A well-known example of a drug given subdermally is **Depot medroxyprogesterone acetate (DMPA)**, a long-acting reversible contraceptive injection. It is administered every 12 weeks and works by releasing the hormone progestin to prevent pregnancy. This method ensures a steady release of the medication into the bloodstream.

## **Why Each Wrong Option is Incorrect**
- **Option A:** - This option is incorrect because, typically, is not administered subdermally; its common route might be oral or another specific route not related to subdermal administration.
- **Option B:** - Similarly, this option does not commonly use the subdermal route; it might be used through a different administration method.
- **Option D:** - This option is incorrect as well because it does not represent a drug commonly associated with subdermal administration.

## **Clinical Pearl / High-Yield Fact**
A memorable point for exams is that **contraceptive implants**, such as **etonogestrel** (Implanon, Nexplanon), are given subdermally. These are small, flexible rods inserted under the skin of the upper arm, releasing progestin to prevent pregnancy for several years. This is a key association for postgraduate medical students.

## **Correct Answer Line**
**Correct Answer: C. **