This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Not a true statement about Osteoclastoma 
Select and explain. 
A. Usually solitary, B. Metaphyseal origin, C. Benign bone tumor, D. Common in age between 20-40 years
B: Metaphyseal origin
Answer: B: Metaphyseal origin 
Explanation: GIANT CELL TUMOR (OSTEOCLASTOMA) It is an aggressive but benign tumor of bone. It is uncommon before age 20 or after 50; 65% of our patients were between ages 20 and 40 years. Giant cell tumors are epiphyseal in origin and they arises after epiphyseal closure. When the lesion is first seen, it is already of good size. Occasionally, it may present as a small lesion