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
About polymerization shrinkage of composite all are true, except: 
Select and explain. 
A. Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area, B. Polymerization shrinkage is high if within the enamel margins, C. Acid etching and priming will decrease polymerization shrinkage, D. Microleakage can occur because of polymerization shrinkage
A: Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area
Answer: A: Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area 
Explanation: None