**Core Concept**
The question requires understanding of alpha-adrenergic blockers, specifically their classification and clinical applications, particularly in benign prostatic hyperplasia (BPH). Alpha blockers relax smooth muscle in the prostate and bladder neck, improving urine flow.

**Why the Correct Answer is Right**
Terazosin is a selective alpha-1 adrenergic receptor blocker that is commonly used in the treatment of BPH. It works by relaxing the smooth muscle in the prostate and bladder neck, thereby improving urine flow. Terazosin does not significantly lower blood pressure at low doses, making it an appropriate choice for patients with BPH who may have hypertension.

**Why Each Wrong Option is Incorrect**
**Option A:** Prazosin is another alpha-1 blocker, but it is more likely to cause hypotension due to its potent vasodilatory effects, making it a less desirable option for patients with BPH and hypertension.
**Option B:** Doxazosin is similar to terazosin but has a higher incidence of hypotension, especially at higher doses.
**Option C:** Alfuzosin is a selective alpha-1 adrenergic receptor blocker used in BPH, but it is not as commonly used as terazosin and may have a different side effect profile.

**Clinical Pearl / High-Yield Fact**
When choosing an alpha blocker for BPH, consider the patient's blood pressure status and the potential for hypotension. Terazosin's favorable side effect profile makes it a good choice for patients with hypertension.

**Correct Answer:** C. Alfuzosin