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: Pyruvate carboxylase is allosterically activated by one of the following compounds, what is it? 
 Options:  <1> Pyruvate. <2> Acetyl-CoA. <3> Malate. <4> Oxalacetate. <5> NAD +.

Ex Output:
2


Ex 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

Ex Output:
4


Ex Input:
Question: What name does the episode receive with psychotic symptoms that occur after a strong alcohol intoxication in which the individual has been consuming large doses of alcohol for several days? 
 Options:  <1> Delirium tremens. <2> Partial amnesias. <3> Alcoholic hallucinosis <4> abstinence syndrome. <5> Korsakoff syndrome.

Ex Output:

3