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'.

Ex Input:
Question: The innate immune response to viruses is mainly mediated by lymphocytes:
Options: <1> B1 <2> Th1. <3> Cytolytic T <4> NK <5> T.

Ex Output:
4

Ex Input:
Question: The target of the aminoglycoside antibacterials is the:
Options: <1> DNA polymerase <2> Transpeptidation of peptidoglycan. <3> 30S subunit of the ribosome. <4> RNA polymerase <5> DNA gyrase.

Ex Output:
3

Ex Input:
Question: In general, and in accordance with the state legislation on pharmacy offices, the minimum population module for the opening of these establishments is:
Options: <1> 2,500 inhabitants per establishment. <2> 1,000 inhabitants per establishment. <3> 1,500 inhabitants per establishment. <4> 2,000 inhabitants per establishment. <5> 2,800 inhabitants per establishment.

Ex Output:
5