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
Chondroblastoma most commonly occurs in : 
Select and explain. 
A. Metaphysis, B. Diaphysis, C. Epiphysis, D. Medullary cavity
C: Epiphysis
Answer: C: Epiphysis 
Explanation: Ans. is 'c' ie Epiphysis Apley's orthopedics writes - "Chondroblastoma is one of the few lesion to appear primarily in the epiphysis"