This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Exaltation is defined as - \nSelect and explain. \nA. Decreased virulence, B. Increased virulence, C. No change, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: The virulence of a strain is not constant and may undergo spontaneous or induced variations. Enhancement of virulence is known as exaltation Ref Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no 74", 'role': 'assistant'}]