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
A protaper F2 series Gutta Percha when cut 1 mm in apical position of canal. The preparation as per in apical region is? 
Select and explain. 
A. 0.29 mm, B. 0.30 mm, C. 0.31 mm, D. 0.33 mm
D: 0.33 mm
Answer: D: 0.33 mm 
Explanation: None