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: 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 +.
Example Output: 2

Example Input: Question: In a Gram positive pathogen involved in pharyngitis and rheumatic fever: 
 Options:  <1> Staphylococcus aureus. <2> Micrococcus luteus. <3> Moraxella catarrhalis. <4> Haemophilus influenzae. <5> Streptococcus pyogenes.
Example Output: 5

Example Input: Question: The chloride present in a solution can be determined volumetrically, by the Mohr method, using Ag (I) as a reagent. What indicator is used in this assessment ?: 
 Options:  <1> K2Cr2O7. <2> Fe2 (SO4) 3. <3> K2CrO4. <4> KSCN <5> FeSO4.
Example Output:
3