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: Radiology
"Sharpened Pencil" appearance of mandibular condyle on radiograph indicates: 
Select and explain. 
A. Osteoarthritis, B. Rheumatoid arthritis, C. Infectious arthritis, D. Juvenile arthritis
B: Rheumatoid arthritis
Answer: B: Rheumatoid arthritis 
Explanation: None