Which Is Incorrect Regarding Guillain Barre Syndrome

Which is incorrect regarding Guillain Barre Syndrome?

A) 80% of patients will have antecedent infection with Campylobacter jejuni.
B) CSF will show low protein, high glucose and often a pleocytosis up to 100.
C) High dose immune globulin and plasmapheresis have been shown to be equally efficacious in reducing length of illness.
D) Severe cases will not only involve demyelination but also axonal degeneration.
E) 85% will recover to their previous normal functioning in one year.