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A person who was a severe alcoholic suffer from deficiency of a vitamin which causes jerky eye movements, staggered walk and disorientation. The same person was under the medication for appendicitis. The drug he intakes for appendicitis blocks the action of the enzyme enterokinase.
(i) Which vitamin deficiency leads to the signs mentioned above?
(ii) Which is affected by the blockage of the action of enterokinaase?