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': 'All of the following can cause Optic Neuritis, except : \nSelect and explain. \nA. Rifampicin, B. Digoxin, C. Chloroquine, D. Ethambutol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Rifampicin Ethambutol, streptomycin & isoniazid are anti-tubercular agents that cause optic neuritis.Q Rifampicin does not cause optic neuritis.', 'role': 'assistant'}]