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: Medicine
[{'content': 'Most common site for secondary metastasis in a case of Hypemephroma: \nSelect and explain. \nA. Adrenal, B. Lungs, C. Brain, D. Bones', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Lungs) 'The most common site of distant metastasis (in RCC) is the lung'", 'role': 'assistant'}]