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
[{'content': 'An increase in heart rate and renin release seen in patients of CHF can be overcome by which of the following drugs: \nSelect and explain. \nA. Minoxidil, B. Metoprolol, C. Metolazone, D. Milrinone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]