e. Multiple sclerosis
The answer is e. (Sadock, 7/e, pp 1505–1511, 299–300.)
Many serious neurological disorders can be mistaken for conversion disorder. The differential diagnosis can be particularly challenging with multiple sclerosis, a disorder also characterized by the sudden appearance of neurological symptoms that, at least in the beginning, often resolve spontaneously. Other causes of possible diagnostic confusion are the fact that symptoms in multiple sclerosis may be precipitated by stress and that multiple sclerosis, like conversion disorder, is more frequent in women.