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: Surgery
A dye injected in to space to see the joint is known as: 
Select and explain. 
A. Arthrography, B. Arthroscopy, C. Arthroplasty, D. Orthopantogram
A: Arthrography
Answer: A: Arthrography 
Explanation: None