A patient with benign prostatic hyperplasia (BPH) is prescribed a medication that relaxes smooth muscle in the bladder neck and prostate, improving urine flow. This drug primarily acts as an antagonist at which receptor type?

✓ Correct Answer: Option C

Alpha-1 adrenergic receptors mediate smooth muscle contraction in the prostate and bladder neck. Blocking these receptors with an antagonist leads to relaxation of these muscles, thereby improving urinary flow in patients with BPH.