This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-Ophthalmology, Subject name: Ophthalmology
All of the following can cause Optic Neuritis, except- 
Select and explain. 
A. Rifampicin, B. Digoxin, C. Chloroquine, D. Ethambutol
A: Rifampicin
Answer: A: Rifampicin 
Explanation: Ans. (a) RifampicinRef Kanski 5/e, p. 601, 603Important drugs causing optic neuritis are quinine, chloroquine, ethambutol, isoniazid (INH), Streptomycin, Digoxin, Amoidarone, NSAIDs (aspirin, indomethacin, phenylbutazone, ibuprofen), vigabatrine, disulfiram).