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: Pharmacology
[{'content': 'All of the following are criteria for high risk of developing chloroquine retinopathy except : \nSelect and explain. \nA. Duration of use > 5 years, B. Seen at a dose of > 250mg/d or > 3mg/kg, C. > 480g total dose, D. Presence of renal failure', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]