This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Current therapeutic status of milrinone in CHF is: 
Select and explain. 
A. First choice drug for a patient of mild CHF, B. As an add on drug to tide over the crisis in refractory CHF, C. Best drug for long-term maintenance therapy of CHF, D. Used only to suppress digitalis induced arrhythmias
B: As an add on drug to tide over the crisis in refractory CHF
Answer: B: As an add on drug to tide over the crisis in refractory CHF 
Explanation: None