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': 'Drug of choice for essential tremors \nSelect and explain. \nA. Sotalol, B. Propranolol, C. Methylphenidate, D. prazosin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: HL Sharma 3rd ed pg no:189 Nonselective beta blockers are used for essential tremors they occur due to contraction of skeletal muscles (beta 2 receptors) cardioselective beta blockers are not useful', 'role': 'assistant'}]