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': "Bull's eye lesion in the macula is seen with : a) Chloroquine b) Hydroxychloroquine c) Quinine d) Sulfamethoxazole e) Primaquine \nSelect and explain. \nA. c, B. ab, C. ac, D. bd", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]