All cause ascending motor paralysis except :
Diabetes mellitus
Diphtheria
Gullien Barre syndrome
Porphyria
Answer is B (Diphtheria): Diptheria is associated with a descending motor paralysis. All other options mentioned in the question give rise to ascending motor paralysis. Impoant causes of descending motor paralysis. Botu I ilium Q. Diphtheria Q Polio These three causes of descending motor paralysis need to be remembered as they are frequently asked and help to answer several questions by exclusion.