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: What speed of perfusion of a drug should you administer to achieve a plasma equilibrium concentration of 10 mg / L knowing that it has a plasma clearance of 500 mL / h? (continuous perfusion): 
 Options:  <1> 50 mg / h. <2> 5 mL / h. <3> 100 mg / h. <4> 100 mg / mL. <5> 5 mg / h.

Ex Output:
5


Ex Input:
Question: The oppressive / tightening pain, of light to moderate intensity, of bilateral localization and that does not worsen with routine physical activity, is what occurs in: 
 Options:  <1> Pelvic pain <2> The burnout. <3> Asthma. <4> Irritable bowel syndrome. <5> Tension headache.

Ex Output:
5


Ex Input:
Question: At what stage of problem-solving therapy are the principles of quantity, deferment of judgment and variety used? 
 Options:  <1> Decision making. <2> Orientation towards the problem. <3> Definition and formulation of the problem. <4> Generation of alternative solutions. <5> Implementation and verification of the solution.

Ex Output:

4