This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexually transmitted diseases, Subject name: Dental
Bivalent HPV vaccine offers protection against HPV types 
Select and explain. 
A. 6, 8, B. 11, 13, C. 16, 18, D. 33, 35
C: 16, 18
Answer: C: 16, 18 
Explanation: Bivalent HPV vaccine (cervarix)- HPV 16, 18 Quadrivalent(gardasil) - HPV 6,11,16,18 HPV 16, 18 - can cause Ca cervix Ref Harrison 20th edition pg 1234