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': 'The most common site of metastasis from the mandibular sarcoma is \nSelect and explain. \nA. Lung, B. Liver, C. Spleen, D. Heart', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]