Explanation
Answer: A
Classes of agents include in the vasodilator group include beta-blockers such as acebutolol, atenolol, betaxolol, bisoprolol, carteolol, carvedilol, esmolol, labetalol, metoprolol, nadolol, penbutolol, pindolol, propranolol, sotalol, and timolol; nitrates/nitrites, also known as anti-anginal vasodilators, such as amyl nitrate, isosorbide dinitrate, isosorbide mononitrate, and nitroglycerin; anti-hypertensive vasodilators such as diazoxide, minoxidil, fenoldopam, nitroprusside, hydralazine, and tolazoline; and calcium channel blockers such as amlodipine, bepridil, diltiazem, felodipine, isradipine, nicardipine, nifedipine, nimodipine, nisoldipine, and verapamil.