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: Dental
Winged rubber dam retainer in endodontics advantages are all except 
Select and explain. 
A. Radiographs are good showing full length of canals, B. Stability, C. Provide extra bucco-lingual retraction, D. Dam, clamp and frame placed in one operation
A: Radiographs are good showing full length of canals
Answer: A: Radiographs are good showing full length of canals 
Explanation: None