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
Coupling agent between filler particle and resin is: 
Select and explain. 
A. Benzoyl peroxide, B. Vinyl silane, C. Benzoin ether, D. Hydroquinone
B: Vinyl silane
Answer: B: Vinyl silane 
Explanation: Coupling agent : A bonding agent applied to the surfaces of reinforcing particles (filler) to ensure that they are chemically bonded to the resin matrix. Organo-silane compounds are the more common class of dental composite coupling agents. Although titanates and zirconates can be used as coupling agents, organosilanes—such as γ-methacryloxypropyl tri-methoxysilane are used most commonly.
Phillips 12 ed page no. 275,286