This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Number of doses of HDCV vaccine required for preexposure prophylaxis - \nSelect and explain. \nA. 7, B. 5, C. 3, D. 1', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pre exposure prophylaxis requires 3doses(0,7,21. REF:<\\p> ANANTHA NARAYANAN MICRONIOLOGY NINTH EDITION PAGE.536', 'role': 'assistant'}]