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
Direct pulp capping has a favourable prognosis if the exposure is around 
Select and explain. 
A. 1 mm, B. 1.5 mm, C. 0.5 mm, D. 2 mm
C: 0.5 mm
Answer: C: 0.5 mm 
Explanation: None