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': 'Tachyphylaxis is an adverse effect of \nSelect and explain. \nA. Betaxalol, B. Latanoprost, C. Dipevifrine, D. Dorzolamide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dipevifrine, an a adrenergic agonist has adverse effect of\xa0Tachyphylaxis.', 'role': 'assistant'}]