This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Drugs used in CHF are: 
Select and explain. 
A. Nesiritide, B. Digoxin, C. Spironolactone, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Digoxin is a cardiac glycoside. Spironolactone is aldosterone antagonist and reduce ECF volume and thus decrease preload. Nesiritide enhances BNP (REF.Essentials of medical pharmacology KD TRIPATHI 8th Edition)