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
A 9 years old Raju develops sudden loss of vision in both eyes. following an attack of measles. The probate cause is - 
Select and explain. 
A. B/L optic neuritis, B. Encephalitis, C. Keratonealacia, D. Raised intraocdura pressure
A: B/L optic neuritis
Answer: A: B/L optic neuritis 
Explanation: None