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: Acetylsalicylic acid is a compound whose pKa is 3.5. What percentage of a dose of this product can be absorbed in the stomach fasting (pH 1.5)? 
 Options:  <1> Less than 10% <2> Between 10% and 20%. <3> More than 90% <4> Between 20% and 40%. <5> 50%
Example Output: 3

Example Input: Question: When the individual is unable to remember important personal information, usually a traumatic or stressful event, what disorder can we think of, within the group of dissociative disorders (DSM-IV-TR)? 
 Options:  <1> Dissociative identity disorder. <2> Dissociative trance disorder. <3> The generalized amnesia. <4> The dissociative amnesia. <5> The dissociative leak
Example Output: 4

Example Input: Question: Which of the following compounds provides nitrogen atoms to the purine and pyrimidine rings? 
 Options:  <1> Aspartate <2> Carbamoyl phosphate. <3> Carbon dioxide. <4> Glutamine <5> Tetrahydrofolate.
Example Output:
1