This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diuretic, Subject name: Pharmacology
Diuretic causing gynaecomastia is - 
Select and explain. 
A. Lubiprostone, B. Spironolactone, C. Cimetidine, D. Chlorthalidone
B: Spironolactone
Answer: B: Spironolactone 
Explanation: Ans. is 'b' i.e., Spironolactone Drugs causing gynecomastia* Calcium channel antagonist* Isoniazide* Reserpine* Clomiphene* Ketoconazole* Digitalis* Methyldopa* Estrogens* Testosterone* Flutamide* Phenytoin* Cimetidine* Ethionamide* Griseofulvin* Goserelin* Griseofulvin* Spironolactone* Cyprotenrone acetate Note: Cimetidine also causes gynaecomastia, but it is not a diuretic.