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'.

Example Input: Question: The set of means and systems that facilitate the contact of the infectious agent with the recipient subject corresponds to: 
 Options:  <1> Source of infection. <2> Habitat. <3> Transmission mechanism. <4> Biotope <5> Reservoir.
Example Output: 3

Example Input: Question: A 30-year-old woman, previously healthy, presents a picture of right facial weakness in the course of about 20 hours, so she can not close her right eye and her mouth has been twisted. Refers to see double with the right lateral gaze. Which of the following diagnostic possibilities seems most likely? 
 Options:  <1> Bell's palsy <2> Ramsay-Hunt syndrome (herpetic facial paralysis). <3> Sarcoidosis <4> Left sylvian infarction with involvement of the rolandic operculum. <5> Protuberant involvement due to an outbreak of multiple sclerosis.
Example Output: 5

Example Input: Question: The least effective prevention measure in the appearance of an outbreak of salmonellosis is: 
 Options:  <1> Active immunization to the population at risk. <2> Rigorous and frequent hand washing, as well as utensils and surfaces that will be used for cooking. <3> Keep food in the refrigerator. <4> Cook food with sufficient temperature (at least 70ºC). <5> Quick refrigeration of cooked foods.
Example Output:
1