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 primary teeth, gingival seat in a class II preparation is: 
Select and explain. 
A. Left unbevelled, B. Beveled so as to remove caries, C. Beveled so as to remove unsupported enamel rods, D. Beveled same as permanent tooth
A: Left unbevelled
Answer: A: Left unbevelled 
Explanation: None