This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Neoplasia), Subject name: Surgery
[{'content': 'Most common primary of metastatic bone tumor in a male is? \nSelect and explain. \nA. Lung, B. Liver, C. Bone, D. Brain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) LungREF: Bailey & love 24th edition page 1330, Swartz\'s surgery 8th edition page 1330"Prostate, breast and lung primaries account for 80 % of all bone metastasis"Out of the options provided lung is the best possible answer', 'role': 'assistant'}]