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 metastases of osteosarcoma is \nSelect and explain. \nA. Liver, B. Spleen, C. Lymph nodes, D. Lung', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]