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': 'Histidine load test is done for \nSelect and explain. \nA. Histidine deficiency, B. Folic acid deficiency, C. Glutamate deficiency, D. Vitamin B12 deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Histidine load test / FIGLU test.', 'role': 'assistant'}]