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
For making temporary restorations, the impression material preferred is: 
Select and explain. 
A. Alginate, B. Polyvinyl siloxane, C. Both, D. None of the above
C: Both
Answer: C: Both 
Explanation: The technique involves making a preoperative impression with elastic impression material. Alginate impression materials may be used and are relatively inexpensive. The preoperative impression may be made with polyvinyl siloxane (PVS) impression material, if additional accuracy, stability and durability are required.
Sturdevant operative dentistry 7th Edition, Page No:120