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: Pathology
[{'content': 'Numbness of lip seen with no previous dental treatment \nSelect and explain. \nA. Meta static carcinoma, B. Central nervous system lesion, C. Osteomyelitis, D. Infection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]