Question

is a potassium sparing diuretic.

• A. Furosemide
• B. Spironolactone
• C. Mannitol
• D. Acetazolamide

Hint:

Spironolactone "spares" Potassium ($K^+$).

Answer 1

The Correct Option is B

Step 1: Concept
Diuretics are drugs that increase urine output. Potassium-sparing diuretics increase sodium excretion without causing significant potassium loss.

Step 2: Meaning
Spironolactone is an aldosterone antagonist that works in the distal tubule and collecting duct.

Step 3: Analysis
Furosemide is a loop diuretic (potassium-wasting). Mannitol is an osmotic diuretic. Acetazolamide is a carbonic anhydrase inhibitor. Spironolactone competes with aldosterone, leading to sodium loss and potassium retention.

Step 4: Conclusion
Therefore, Spironolactone is a potassium-sparing diuretic.

Final Answer: (B)