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': 'The percentage of atropine present in atropine drops as cycloplegic is: \nSelect and explain. \nA. 0.50%, B. 1%, C. 4%, D. 2%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 1%', 'role': 'assistant'}]