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
[{'content': 'Not a dietary source of vit. B12 \nSelect and explain. \nA. Fish, B. Meat, C. Sovabean, D. Liver', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Soyabean', 'role': 'assistant'}]