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: Ans. is 'a' i.e., RSVThe viral envelope contains a surface glycoprotein G, by which it is attached to the cell surface of the host cells. It contains F protein but lacks both H and N proteins. The F protein induces the fusion of the infected cells with adjoining cells, resulting in the formation of large multinucleated syncytia, from which the virus derives its name.", 'role': 'assistant'}]