Answer:
(B). Spironolactone.
Step-by-step explanation:
Diuretic drugs are used to treat hypertension by increasing diuresis (urine formation). Potassium sparing diuretics can be defined as a class of diuretic drugs that decrease secretion of potassium ions into the urine.
Normal diuretic can cause increased potassium loss that lead to hypokalemia (low level of potassium). Potassium ions are necessary for proper nerve transmission and muscle functioning.
Hence, potassium sparing drugs are used with diuretics for hypertension without causing lose of potassium ions from the body. Examples of potassium sparing diuretics are spironolactone, amiloride, and eplerenone.
Thus, the correct answer is option (B).