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': 'Virus lacking hemagglutinin and neuraminidase but having membrane fusion protein is - \nSelect and explain. \nA. RSV, B. CMV, C. HSV, D. EBV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RSV differs from another paramyxovirus in not possessing hemaglutinin activity it also does not have neuraminidase or hemolytic activity REF:ANANTHANARYANAN TTEXTBOOKOF MICROBIOLOGY 9EDITION PGNO.510', 'role': 'assistant'}]