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
All are temporary record base material, except? 
Select and explain. 
A. Shellac, B. Autopolymerizing resin, C. Vacuum formed vinyl or polystyrene, D. Heat cure acrylic resin
D: Heat cure acrylic resin
Answer: D: Heat cure acrylic resin 
Explanation: None