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: Microbiology
[{'content': 'Hydatid cyst occurs most commonly in: \nSelect and explain. \nA. Lung, B. Liver, C. Spleen, D. Brain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Liver', 'role': 'assistant'}]