This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint disorders, Subject name: Orthopaedics
Earliest radiological change in RHEUMATOID AHRITIS is ? 
Select and explain. 
A. Decreased joint space, B. Aicular erosion, C. Periaicular osteopenia, D. Subchondral cyst
C: Periaicular osteopenia
Answer: C: Periaicular osteopenia 
Explanation: REF : MAHESWARI 9TH ED