This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sutures and Anastomoses, Subject name: Surgery
Tissue suturing glue contains:- 
Select and explain. 
A. Cyanoacrylate, B. Ethanolamine oleate, C. Methacrylate, D. Polychloroprene
A: Cyanoacrylate
Answer: A: Cyanoacrylate 
Explanation: Tissue glue Tissue glue is also available based upon a solution of n-butyl-2-cyanoacrylate monomer. When it is applied to a wound, it polymerizes to form a firm adhesive bond Wound does need to be clean, dry, with near perfect hemostasis and under no tension Specific uses: - closing a laceration on the forehead of a fraction child in accident and emergency thus dispensing with local anesthetic and sutures. Relatively expensive, it is quick to use, does not delay wound healing and is associated with an allegedly low infection rate