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
In periapical X-ray, the radiodensity of the root is seen as 'Fast break" 
Select and explain. 
A. Bifurcation of canal, B. Calcification of canal, C. Excessive curvature of root canal, D. Meeting of canals
A: Bifurcation of canal
Answer: A: Bifurcation of canal 
Explanation: None