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': 'Effect of atropine on eye is \nSelect and explain. \nA. Active mydriasis, B. Passive mydriasis, C. Miosis, D. Pin point pupil', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Parasympatholytics like atropine produce passive mydriasis due to blockade of m3 receptors. sympathomimetics produce active mydriasis due to contraction of dilator papillae Ref: Katzung 11th ed pg 117', 'role': 'assistant'}]