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
Mass spectrometry is used for: 
Select and explain. 
A. Pulp vitality assessment., B. Protein and body fluid assessment., C. Pulpal blood flow assessment., D. Pulpal nerve stimulation assessment.
B: Protein and body fluid assessment.
Answer: B: Protein and body fluid assessment. 
Explanation: Mass Spectrometry (MS) is new chemical method used For

Determination of the primary structure of proteins
Assessment of body fluid
Detection of post-translational modifications