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: Surgery
[{'content': 'Most common site of metastasis from breast carcinoma: \nSelect and explain. \nA. Thoracic vertebra, B. Pelvis, C. Femur, D. Lumbar vertebra', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Lumbar vertebra(Ref: Bailey 26/ep811)* MC site of bony mets - Lumbar vertebra > Femur > Thoracic Vertebra > Ribs > Skull.* Osteolytic secondaries are seen commonly.', 'role': 'assistant'}]