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: Microbiology
[{'content': 'Sunlight acts as sterilizing agent because \nSelect and explain. \nA. Long wavelength, B. Short wave length, C. Ozone, D. Heat is present', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]