This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Most common tumor of hand is ? 
Select and explain. 
A. Enchondroma, B. Chondroblastoma, C. Giant cell tumour, D. Osteoid osteoma
A: Enchondroma
Answer: A: Enchondroma 
Explanation: .ENCHONDROMA - This is a benign tumour consisting of a lobulated ma s s of cailage encapsulated by fibrous t issue. The intercellular mat r ix may undergo mucoid degeneration. Frequently the fibrous septae dividing Enchondroma * Age group : 15-30 years * Bones: Small bones of the hand (phalanges, metacarpals etc., usually multiple. * Site : Diaphysis * Others features: Long duration, benign swellings. Swelling is the main complaint. ref:ESSENTIAL OHOPAEDICS,MAHESWARI,ed 3 ,pg no 331