Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: The respiratory syncytial virus is a: 
 Options:  <1> Ortomixovirus. <2> Filovirus. <3> Parvovirus. <4> Togavirus. <5> Paramyxovirus.
