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 papillary muscles: 
 Options:  <1> They contract atrio-ventricular valves. <2> They prevent the reflux of blood to the atria. <3> They avoid the eversion of the semilunar valves. <4> They form the interventricular septum. <5> They are formed by visceral smooth muscle.
