This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Beta blockers are not indicated in \nSelect and explain. \nA. Acute CHF, B. Hypeension, C. Chronic CHF, D. Arrhythmia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref: HL Sharma 3rd ed pg no: 193 Beta blockers are not used in CCF except metoprolol and carvedilol due to their antioxidant propeies they are used only in chronic CHF not in acute in acute CCF or CHF, diuretics , digoxin are used', 'role': 'assistant'}]