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
Most probable chance of developing caries in the following curve is at: 
Select and explain. 
A. Point A, B. Point B, C. Point C, D. Point D
B: Point B
Answer: B: Point B 
Explanation: It is Stephen's curve, which is used for illustration of rapid decrease in pH after sucrose consumption. Exposure of dental plaque to a fermentable carbohydrate leads to decrease in pH rapidly,  reaching minimum in approx. 5-10 minutes. It recovers to its initial value in 20-60 minutes gradually.