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: Pathology
Raw beefy tongue is seen in deficiency of 
Select and explain. 
A. Vitamin B1, B. Vitamin B2, C. Vitamin B3, D. Vitamin B12
C: Vitamin B3
Answer: C: Vitamin B3 
Explanation: None