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: Dental
[{'content': 'Mass spectrometry is used for: \nSelect and explain. \nA. Pulp vitality assessment., B. Protein and body fluid assessment., C. Pulpal blood flow assessment., D. Pulpal nerve stimulation assessment.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mass Spectrometry (MS) is new chemical method used For\n\nDetermination of the primary structure of proteins\nAssessment of body fluid\nDetection of post-translational modifications', 'role': 'assistant'}]