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': 'Viral enterotoxin is detected as a possible mechanism of pathogenesis in - \nSelect and explain. \nA. Adenovirus, B. Rotavirus, C. Calicivirus, D. Astrovirus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]