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 clinical sensitivity of an analytical parameter (test) is defined as: 
 Options:  <1> The mean concentrations of this test in healthy patients. <2> A pathological concentration of the test in the presence of the disease. <3> A pathological concentration of the test in the absence of the disease. <4> A normal concentration of the test in the absence of the disease. <5> A normal concentration of the test in the presence of the disease.
Example Output: 2

Example Input: Question: Which amino acid serves as a starting point for the synthesis of porphyrins (heme group)? 
 Options:  <1> Valina <2> To the girl. <3> Asparagine <4> Lysine <5> Glycine
Example Output: 5

Example Input: Question: A patient with chronic renal failure has to follow a controlled diet in potassium. What foods should you suppress to reduce your potassium intake ?: 
 Options:  <1> Sugars <2> Fish. <3> Fruit in compote. <4> Raw vegetables. <5> Fruit nectar
Example Output:
4