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
Which of the following is a pulsatile tumor? 
Select and explain. 
A. Osteosarcoma, B. Chondrosarcoma, C. Ewing's sarcoma, D. Osteoclastoma
A: Osteosarcoma
Answer: A: Osteosarcoma 
Explanation: Ans. is 'A Osteosarcoma Osteosarcoma>ABC>angioenfothelioma of bone>GCT Other bone tumors which can be pulsatile Angiosarcoma/ angioendothelioma of bone Aneurysmal bone cyst Metastasis from Renal cell carcinoma and Thyroid GYNAE & OBSTETRICS