<prompt> Cause of organic amnestic syndrome includes: a. Multiple sclerosis b. Hypoglycemia c. Hyperglycemia d. Hypoxia e. Hypercapniaall of the abovea,b,ea,b,db,c,d  <response>: Amnestic syndrome is characterized by inability to form new memories anterograde amnesia and the inability to recall previously remembered knowledge retrograde amnesia. The major causes of amnestic disorders are: Thiamine deficiency Korsakoff syndrome Hypoglycemia Primary brain conditionshead trauma,seizures,cerebral tumors, cerebrovascular disease, hypoxia, electroconvulsive therapy, multiple sclerosis Substance related disorders alcohol, benzodiazepines. 