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: Biochemistry
Not a dietary source of vit. B12 
Select and explain. 
A. Fish, B. Meat, C. Sovabean, D. Liver
C: Sovabean
Answer: C: Sovabean 
Explanation: C i.e. Soyabean