This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concepts of Immunity, Classification of Vaccines, Subject name: Social & Preventive Medicine
[{'content': 'HPV vaccine is: \nSelect and explain. \nA. Monovalent, B. Bivalent, C. Quardrivalent, D. Bivalent & quadrivalent', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Currently two Human Papilloma Virus (HPV) vaccines are available in India as a protection against cervical cancer Gardasil vaccine: HPV types 6, 11, 16, 18 (Quadrivalent) Cervarix vaccine: HPV types 16, 18 (Bivalent)', 'role': 'assistant'}]