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: Surgery
[{'content': 'Myofascial pain dysfunction may be described as _____. \nSelect and explain. \nA. Masticatory pain and limited function, B. Clicking and popping of the joint, C. An infectious process, D. Dislocation of the disc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In myofascial pain dysfunction the source of the pain and dysfunction is muscular. Here dysfunction is associated with decreased opening or inability to chew.', 'role': 'assistant'}]