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': 'Shortest acting Mydriatic and Cycloplegic is \nSelect and explain. \nA. Atropine, B. Phenylephrine, C. Tropicamide, D. Homatropine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Shortest acting Mydriatic and Cycloplegic is Tropicamide.\nPhenylephrine\xa0is only mydriatic with no cycloplegic property.', 'role': 'assistant'}]