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
The ideal crown preparation has a degree of convergence from gingival finish line towards occlusal is 
Select and explain. 
A. 2° - 4°, B. 3° - 5°, C. 4° - 9°, D. 8° - 11°
B: 3° - 5°
Answer: B: 3° - 5° 
Explanation: None