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: Surgery
[{'content': "Gardner's syndrome is associated with all except \nSelect and explain. \nA. Sebacious cyst, B. Desmoid tumor, C. Bony exostosis, D. Brain tumor", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Brain tumor is seen with turcot syndrome.', 'role': 'assistant'}]