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
Virus lacking hemagglutinin and neuraminidase but having membrane fusion protein is: 
Select and explain. 
A. RSV, B. CMV, C. HSV, D. EBV
A: RSV
Answer: A: RSV 
Explanation: 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.