Which Is INCORRECT Regarding the Treatment of Multiple Sclerosis

Which is INCORRECT regarding the treatment of multiple sclerosis?

A) Interferon and glatiramer have bee shown to reduce number of relapses in relapsingremitting MS.
B) IV immunoglobulin monthly for 2 years has shown to reduce annual exacerbations in relapsing-remitting MS.
C) No treatment currently exists for primary progressive MS to modify the disease.
D) Exacerbations of MS are treated with methlypred IV as studies have shown this to be superior to other glucocorticoids.
E) Symptomatic treatment of muscle spasticity is usually best achieved with baclofen.