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
During polymerisation of acrylic resin, above what temperature benzoyl peroxide form free radicals? 
Select and explain. 
A. 25°C, B. 37°C, C. 45°C, D. 60°C
D: 60°C
Answer: D: 60°C 
Explanation: The most commonly employed initiator is benzoyl peroxide, which is activated rapidly between 50°C and 100°C to release two free radicals per benzoyl peroxide molecule.
Reference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 101