This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Orthopaedics
Most common true benign tumor of the bone is - 
Select and explain. 
A. Giant cell tumor, B. Simple bone cyst, C. Osteoid osteoma, D. Enchondroma
C: Osteoid osteoma
Answer: C: Osteoid osteoma 
Explanation: Commonest benign tumor of bone -----osteochondroma Commonest true benign tumor of bone -----osteoid osteoma Refer Maheshwari 6th/e p 247