Answer:
Thiamine (vitamin B-1).
Explanation:
Wernicke–Korsakoff syndrome is a brain disorder which occurs due to deficincy of vitamin B1. Alcoholism is mostly the main cause of Wernicke–Korsakoff syndrome. The main risk factors for this disease is kidney dialysis and AIDs.
The symptoms of Wernicke–Korsakoff syndrome is double vision , loss of muscles coordination and disturbed mental state mainly confused.