This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
[{'content': 'Replacing alanine by which amiens acid will increase UV absorbance of protein at 280nm wavelength \nSelect and explain. \nA. tryptophan, B. Arginine, C. Guanine, D. Lysine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ref : satyanaryana 8th ed', 'role': 'assistant'}]