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
In case of addition silicones what should be done for better cast 
Select and explain. 
A. Apply ketone over tray, B. Apply chloroform over tray, C. Add flavouring agent to prevent bad odour, D. Delay pouring of cast
D: Delay pouring of cast
Answer: D: Delay pouring of cast 
Explanation: None