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': 'Vitamin involved in 1 carbon metabolism: \nSelect and explain. \nA. Folic acid, B. Thiamine, C. Pyridoxine, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans:A.)Folic Acid.ONE CARBON GENERATION AND UTILIZATION', 'role': 'assistant'}]