This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'Pagets disease except \nSelect and explain. \nA. Virus association, B. Progress to chondrosarcoma, C. Less than 1% malignant, D. Ostesclerotic phase seen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Robbins basic pathology 9th edition page no 771,heading=clinical Course, 3rd paragraph The development of sarcoma is a dreaded but founately rare complication of paget disease occuring in only an estimated 1%of patients. The sarcoma are usually osteogenic. Paget disease is also known as Osteitis Deformans.', 'role': 'assistant'}]