Final answer:
option c.Captopril is an ACE inhibitor used to treat high blood pressure and congestive heart failure, and it works differently from diuretics like chlorothiazide, furosemide, and spironolactone.
Step-by-step explanation:
Captopril is an ACE inhibitor, which is a type of medication primarily used to treat high blood pressure (hypertension) and congestive heart failure. Unlike the other drugs listed—chlorothiazide, furosemide, and spironolactone, which are diuretics that help the body get rid of excess salt and water by increasing urine output—captopril works by relaxing blood vessels, making it easier for the heart to pump blood.
ACE inhibitors like captopril reduce the production of angiotensin II, a substance that narrows blood vessels and releases hormones that can raise blood pressure. By inhibiting this action, the medication effectively lowers blood pressure and reduces the strain on the heart. It's also beneficial in protecting the kidneys in patients with diabetes who have kidney disease.