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: Medicine
Most common presenting finding of multiple sclerosis is - 
Select and explain. 
A. Intranuclear ophthalmoplegia, B. Optic neuritis, C. Transverse myelitis, D. Cerebellar ataxia
B: Optic neuritis
Answer: B: Optic neuritis 
Explanation: None