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 should be used very cautiously in childhood tuberculosis due to which of its side effect ? \nSelect and explain. \nA. Ocular toxicity, B. Renal damage, C. Hepatotoxicity, D. Neurotoxicity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]