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
Putty wash technique: 
Select and explain. 
A. Light body and putty used at the same time, B. Putty used first and light body used second, C. Light body first and putty later, D. None of the above
B: Putty used first and light body used second
Answer: B: Putty used first and light body used second 
Explanation: None