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 proximal walls of a class II cavity on a deciduous molar: 
Select and explain. 
A. Follow directions of enamel rods, B. Converge toward occlusal surface, C. Diverge toward occlusal surface, D. Undermine enamel which is very thin
B: Converge toward occlusal surface
Answer: B: Converge toward occlusal surface 
Explanation: None