This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Not true about synovial chondromatosis 
Select and explain. 
A. Snow storm appearance of joint, B. Most common cause of loose bodies in joint, C. Most common in knee joint, D. Trauma can lead to synovial chondromatosis
B: Most common cause of loose bodies in joint
Answer: B: Most common cause of loose bodies in joint 
Explanation: Most common cause of loose bodies is osteoarthritis.