This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
A 25-year-male, Intermittent Diplopia, Urinary incontinence, VI Nerve palsy. Most likely diagnosis is: 
Select and explain. 
A. Acute infarct, B. Multiple sclerosis, C. Intraparenchymal bleed, D. Alzheimer's disease
B: Multiple sclerosis
Answer: B: Multiple sclerosis 
Explanation: Ans. B Multiple sclerosisYoung patient with significant neuro-deficits, involvement of periventricular and pericallosal white matter is classical for MS. On MRI McDonalds criteria is used for diagnosis. Venus necklaceQ/Dawson's fingersQ/Ependymal dot-dash signQ seen.