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
Duration of shade selection should be: 
Select and explain. 
A. 5 second, B. 10 second, C. 15 second, D. 20 second
A: 5 second
Answer: A: 5 second 
Explanation: choose 5 sec if question appears in neet.
While 10 sec for aiims.