This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
Wernicke-Korsakoff's syndrome is due to the deficiency of: FMGE 10; JIPMER 10; NIMHANS 14 
Select and explain. 
A. Pyridoxine, B. Thiamine, C. Vitamin B12, D. Riboflavin
B: Thiamine
Answer: B: Thiamine 
Explanation: Ans. Thiamine