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
Ethambutol should be used very cautiously in childhood tuberculosis due to which of its side effect ? 
Select and explain. 
A. Ocular toxicity, B. Renal damage, C. Hepatotoxicity, D. Neurotoxicity
A: Ocular toxicity
Answer: A: Ocular toxicity 
Explanation: None