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 hyperhidrosis is \nSelect and explain. \nA. Phenylephrine, B. Atropine, C. Darifenacin, D. Trospium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Darifenacin is considered as drug of choice for hyperhidrosis-excess sweating as it blocks m3 receptors on sweat glands Ref: KDT 6th ed pg 118', 'role': 'assistant'}]