Instructions: 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 main virulence factor of Streptococcus pneumoniae is one (one):
Options: <1> Fimbria. <2> Capsule. <3> Scourge <4> Endotoxin <5> Adhesin
Output:
2