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: Consider Input: Question: A 75-year-old man who reported decreased visual acuity in his right eye of two weeks of evolution. In the fundus examination, soft drusen and serous detachment at the level of the macula are seen. What treatment is currently the most indicated for this disease? 
 Options:  <1> Focal photocoagulation with laser. <2> Photodynamic therapy. <3> Intravitreal injections of anti-angiogenic drugs. <4> Posterior vitrectomy. <5> Observation.

Output: 3


Input: Consider Input: Question: If you want to study the efficacy and safety of a new cytostatic for a specific oncological process and, at the same time, contrast the efficacy that adds a new monoclonal antibody to this treatment, what would be the most appropriate study design? 
 Options:  <1> Parallel test. <2> Cross test <3> Factorial test. <4> Sequential test. <5> Test of n = 1.

Output: 3


Input: Consider Input: Question: The number of pairs of metacentric chromosomes of the human karyotype is: 
 Options:  <1> 8 <2> 6 <3> Four. <4> 12 <5> two.


Output: 3