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 non-active carious lesion is distinguished by all except: 
Select and explain. 
A. Covered by a layer of plaque, B. Soft and leathery in consistensy, C. Brown or black discolouration, D. Severe pain during caries removal
D: Severe pain during caries removal
Answer: D: Severe pain during caries removal 
Explanation: None