This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bone Tumour, Subject name: Orthopaedics
[{'content': 'Skeletal metastasis is common in: \nSelect and explain. \nA. Cancer stomach, B. Cancer pancreas, C. Hepatoma, D. Cancer breast', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Cancer breast)Ref: Maheshwari Ortho, 3rd ed, p. 224', 'role': 'assistant'}]