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': 'Ethambutol is avoided in children as it causes ? \nSelect and explain. \nA. Dental maldevelopment, B. Visual disturbance, C. Renal failure, D. Growth retardation', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Visual disturbance", 'role': 'assistant'}]