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 cycloplegics except – \nSelect and explain. \nA. Phenylephrine, B. Atropine, C. Homatropine, D. Cocaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phenylephrine is not a cycloplegic, it causes mydriasis but no cycloplegia.\n\nIn addition to mydriasis, cocaine causes partial cycloplegia". __\xa0Principles & practice of ophthalmology', 'role': 'assistant'}]