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
Optic neuritis is caused by : 
Select and explain. 
A. Ethambutol, B. INH, C. Rifampicin, D. Chloromycetin
A: Ethambutol
Answer: A: Ethambutol 
Explanation: None