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: Radiology
[{'content': 'Most common site of Metastasis of Lung carcinoma \nSelect and explain. \nA. Liver, B. Kidney, C. Brain, D. Adrenals', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Brain is m/c site of metastasis of lung carcinoma.\nAdrenal is m/c endocrinal site to be involved.', 'role': 'assistant'}]