**Core Concept**
Anti-androgens are a class of medications that inhibit the effects of androgens, such as testosterone and dihydrotestosterone (DHT), by blocking their receptors or interfering with their synthesis. They are used in the treatment of conditions like prostate cancer, acne, and hirsutism.

**Why the Correct Answer is Right**
Anti-androgens work by binding to androgen receptors, thereby preventing androgens from exerting their effects on cells. This class of medications includes finasteride, which inhibits the enzyme 5-alpha-reductase, responsible for converting testosterone to DHT. Other examples of anti-androgens include spironolactone, which blocks androgen receptors, and flutamide, which also blocks androgen receptors.

**Why Each Wrong Option is Incorrect**
**Option A:**
* This option is likely incorrect because it is not a well-known anti-androgen.

**Option B:**
* This option is likely incorrect because it is not a well-known anti-androgen, and its pharmacological properties are not consistent with anti-androgen activity.

**Option C:**
* This option is likely incorrect because it is not a well-known anti-androgen, and its pharmacological properties are not consistent with anti-androgen activity.

**Clinical Pearl / High-Yield Fact**
Anti-androgens can have significant side effects, particularly on the reproductive and endocrine systems. It is essential to monitor patients on anti-androgen therapy for signs of hypogonadism, gynecomastia, and other adverse effects.

**Correct Answer: D.**