This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins, Subject name: Biochemistry
[{'content': 'Figlu is a metabolite of: \nSelect and explain. \nA. Folic Acid, B. Histidine, C. Alanine, D. Tyrosine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. HistidineFIGLU stands for N- formimino glutamate and is formed during catabolism of Histidine. In the reaction there is transfer of formimino group of FIGLU to tetra hydro folate to form glutamate. In folic acid deficiency this reaction is blocked and FIGLU is excreted in urine. So excretion of FIGLU following a test dose of histidine provides a diagnostic test for folic acid deficiency.', 'role': 'assistant'}]