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 will cause Bull's eye retinopathy \nSelect and explain. \nA. INH, B. Chloroquine, C. Ethambutol, D. Steroids", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Chloroquine', 'role': 'assistant'}]