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': "Long arm chromosome 5 deletion is seen in - \nSelect and explain. \nA. Crohn's disease, B. Ulcerative colotis, C. Polyposis coli, D. Pheochromocytoma", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]