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': 'The appearance of cowdry type A inclusion bodies - \nSelect and explain. \nA. Granular, B. Circumscribed, C. In polio, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Intranuclear inclusion bodies were classified into two types by cowdry :\n\n\nCowdry type A:- These are of variable size and granular in appearance, e.g. in herpesvirus and yellow fever virus.\nCowdry type B:- These are more circumscribed and often multiple, as with adenovirus and poliovirus.', 'role': 'assistant'}]