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 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: A 70-year-old woman, worried about her risk of having a stroke, comes to our office because her mother died of this cause a year ago. He has a history of high blood pressure and type 2 diabetes mellitus, so he is being treated with glipizide, aspirin, enalapril and atorvastatin. He smokes 20 cigarettes a day and does not exercise regularly. On examination, a blood pressure of 150/80 mmHg is detected. The analytical highlights a hemoglobin A1c of 8% and an LDL cholesterol of 110 mg / dl. Which of the following is associated with a greater reduction in stroke risk? 
 Options:  <1> Achieve optimal levels of hemoglobin A1C. <2> Achieve an optimal control of blood pressure. <3> Add an antioxidant to the treatment. <4> Abandon tobacco <5> Achieve optimal levels of LDL.

Ex Output:
2


Ex Input:
Question: Potentiometric titration of chloride with a silver electrode, using a silver ion standard solution: 
 Options:  <1> It is based on the formation of silver complexes in the presence of a high concentration of chloride. <2> Follow the Nernst equation, in which the variation of the potential varies linearly with the concentration of silver ion. <3> It shows an equivalence point where pAg does not depend on the chloride concentration. <4> It gives rise to potential variations that depend on the amount of AgCl formed. <5> It provides a titration curve in which the jump of pAg does not depend on the concentration of chloride.

Ex Output:

3