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': 'Polycystic disease of the kidney may have cysts in all of the following organs except - \nSelect and explain. \nA. Lung, B. Liver, C. Pancreas, D. Spleen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]