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': 'Method of choice for protein identification \nSelect and explain. \nA. Edman technique, B. Mass spectrometry, C. Sanger technique, D. 2-D electrophoresis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: While the requisite amino acid sequence information can be obtained using the Edman technique, today mass spectrometry (MS) has emerged as the method of choice for protein identification.\nRef: Harper’s illustrated biochemistry. 30th edition page no: 30', 'role': 'assistant'}]