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
Which of the following is a mineralocorticoid antagonist - 
Select and explain. 
A. Spironolactone, B. Inamrinone, C. Nicorandil, D. Ketorolac
A: Spironolactone
Answer: A: Spironolactone 
Explanation: Ans. is 'a' i.e., Spironolactone Potassium sparing diureticsAldosterone antagonistsRenal epithelial Ma+ channel inhibitorso Spironolactoneo Eplerononeo Canrenoneo Potassium canrenoneo Prorenoneo MexrenoneoAmilorideo Triamterene