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: Pathology
[{'content': 'Most important amino acid for formation Neutrophilic extracellular trap (NET) is \nSelect and explain. \nA. Leucine, B. Methionine, C. Citrulline, D. Valine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Conversion of arginine residues to Citrulline in the histones is an essential step in the formation of neutrophill extracillular traps.', 'role': 'assistant'}]