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: Ophthalmology
[{'content': 'All of the following are examples of mydriatics except : \nSelect and explain. \nA. Atropine, B. Homatropine, C. Tropicamide, D. Pirenzepine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Pirenzepine', 'role': 'assistant'}]