189) A 38 year old woman presents for follow up visit of right leg weakness. Her history is significant for episodes of diplopia and right sided weakness that recurred thrice in the last 3 months. These presentations were also associated with concomitant urinary incontinence and ataxia. Her most recent hospitalization for such an episode was three weeks ago. She was discharged after her symptoms improved upon using intravenous steroids. An MRI brain taken during the initial episode revealed multiple white matter lesions in the peri-ventricular area. Today, she feels well except for minimal weakness in her right leg. Most appropriate drug that should be administered to this patient to reduce the frequency and severity of these recurrences?
A) Methyl dopa
B) Interferon Beta
C) Methyl Prednisolone
D) Interferon Alpha
E) Intravenos Immunoglobulin ( IVIG)