## Core Concept
The question tests the understanding of anti-androgenic drugs, which are medications that block or suppress androgens, such as testosterone and dihydrotestosterone (DHT). These drugs are used in the treatment of conditions like prostate cancer, benign prostatic hyperplasia (BPH), and hirsutism. Anti-androgens work by competing with androgens for binding to androgen receptors.

## Why the Correct Answer is Right
Flutamide is a nonsteroidal anti-androgen primarily used in the treatment of prostate cancer. It works by binding to androgen receptors in the prostate gland, thereby blocking the action of androgens like testosterone and DHT. This blockade results in the inhibition of prostate cancer cell growth. Flutamide is a pure anti-androgen, meaning it does not have any agonist activity.

## Why Each Wrong Option is Incorrect
* **Option A:** This option is incorrect because it is not specified, making it impossible to evaluate its accuracy.
* **Option B:** This option is incorrect because it is not specified, making it impossible to evaluate its accuracy.
* **Option D:** This option is incorrect because it is not specified, making it impossible to evaluate its accuracy.

## Clinical Pearl / High-Yield Fact
A key point to remember is that flutamide is often associated with a risk of hepatotoxicity, and liver function tests should be monitored during its use. Another important clinical correlation is that flutamide can cause gynecomastia and sexual dysfunction due to its anti-androgenic effects.

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