This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prostate and seminal vesicles, Subject name: Surgery
[{'content': 'Patient because of positive biopsy findings and negative workup undergoes a radical prostatectomy. The pathology repo reveals Gleason score 9/10 and involvement of several pelvic lymph nodes. Which is the most likely site for prostatic cancer metastasis? \nSelect and explain. \nA. Liver, B. Kidney, C. Lung, D. Bone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bone metastasis is a characteristic feature of prostatic cancer. The lesions are typically osteoblastic on x-ray, and the serum acid phosphatase level becomes elevated', 'role': 'assistant'}]