This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Surgery
Most common primary of metastatic bone tumor in a male is: 
Select and explain. 
A. Lung, B. Liver, C. Bone, D. Brain
A: Lung
Answer: A: Lung 
Explanation: Among the given options, Most common primary of metastatic bone tumor in a male is carcinoma lung. BONE METASTASIS Prostate, breast and lung primaries account of 80% of all bone metastasis. MC site of primary for bone metastasis: CA Breast > CA prostate > RCC > CA lung > CA thyroid > CA bladder MC cause of osteoblastic secondaries in males: CA Prostate MC cause of osteoblastic secondaries in females: CA Breast MC tumor metastasize to bone in females: CA Breast Lytic expansile metastasis is seen in: RCC ,follicular carcinoma thyroid MC site of bone metastasis: Dorsal spine (Thoracic veebra)