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 molecules has the highest number of antibonding electrons? 
 Options:  <1> B2. <2> N 2 <3> Li2. <4> F 2 <5> O 2
Example Output: 4

Example Input: Question: What does the intersessional sampling used in observation techniques refer to: 
 Options:  <1> To the registration of relevant information between sessions. <2> To the periodicity, number and criteria of start-end of the sessions. <3> To the successive rounds of observation of the subjects to observe. <4> To the temporary selection and its interval or partial modality. <5> To the record of focal events that occur between sessions.
Example Output: 2

Example Input: Question: Chronic interstitial nephropathies affect the tubular structures and the renal interstitium. If we analyze the functional defects that these pathologies can produce, we will NOT wait to find: 
 Options:  <1> Isostenuria. <2> Hypochloremic metabolic alkalosis. <3> Tubular atrophy and interstitial fibrosis in the renal histological study. <4> Normal or little expressive urinary sediment. <5> Proteinuria of less than 2 grams per day.
Example Output:
2