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: Social & Preventive Medicine
[{'content': 'HPV (Human papilloma virus) vaccine is: \nSelect and explain. \nA. Monovalent, B. Bivalent, C. Quadrivalent, D. Bivalent and Quadrivalent', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bivalent and Quadrivalent', 'role': 'assistant'}]