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: Which of the following conditions causes a decrease in the O2 saturation of the hemoglobin that is not due to a decrease in the partial pressure of oxygen? 
 Options:  <1> Ventilation-perfusion ratio lower than normal. <2> Anemia. <3> Carbon monoxide poisoning. <4> Hypoventilation. <5> Shunt venoarterial.
Example Output: 3

Example Input: Question: A colonoscopy of colorectal cancer screening is performed on a patient with ulcerative colitis with involvement up to the transverse colon. Colonoscopy shows no signs of inflammatory activity. Multiple biopsies were performed every 10 cm. The biopsies were reviewed by 2 expert pathologists demonstrating a focus of high grade dysplasia in one of the biopsies performed in the sigmoid colon. What would you indicate next? 
 Options:  <1> Repeat the colonoscopy to confirm the diagnosis. <2> Intensive surveillance with colonoscopy every 3 to 6 months. <3> Repeat the examination and perform a chromoendoscopy to identify the lesion and perform an endoscopic mucosectomy. <4> Total proctocolectomy. <5> Treatment with mesalazine at doses of 2-3 grams per day and repeat the scan at 3 to 6 months.
Example Output: 4

Example Input: Question: What is interpersonal therapy of social rhythm (or interpersonal and social rhythm therapy)? 
 Options:  <1> An adaptation of interpersonal therapy to the treatment of dysthymic disorder. <2> An adaptation of interpersonal therapy to the treatment of severe major depressive disorder. <3> A therapy resulting from combining interpersonal therapy, behavioral activation therapy and social problem solving therapy. <4> An adaptation of interpersonal therapy for patients with major depressive disorder who have serious problems in their social relationships. <5> An adaptation of interpersonal therapy to the treatment of bipolar disorder.
Example Output:
5