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': 'Which of the following mydriatic does not have any cycloplegic effect: September 2010 \nSelect and explain. \nA. Phenyephrine, B. Tropicamide, C. Atropine, D. Cocaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Phenyephrine Tropicamide has the quickest and briefest action 1% Atropine ointment has the longest duration of action and is most potent.', 'role': 'assistant'}]