This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
FIGLU is related to - 
Select and explain. 
A. Tyrosine, B. Tryptophan, C. Histidine, D. Proline
C: Histidine
Answer: C: Histidine 
Explanation: Ans. is 'c' i.e., Histidine* FIGLU test or Formiminoglutamate test is done to detect the deficiency of folate.* This test is based on histidine metabolism.