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': "Giant cell (Hecht's) pneumonia is due to - \nSelect and explain. \nA. CMV, B. Measles, C. Malaria, D. P. Carinii", 'role': 'user'}, {'content': "Answer: B \nExplanation: Most patients recover uneventfully but quite a few develop complication which may be due to virus or secondary bacterial infection. Rarely the virus may cause fatal giant cell pneumonia. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:512", 'role': 'assistant'}]