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
Virus lacking hemagglutinin and nuraminidase but have membrane fusion protein is: 
Select and explain. 
A. RSV, B. CMV, C. HSV, D. Ebestein Barr virs
A: RSV
Answer: A: RSV 
Explanation: Ans. a. RSV