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: An ideal diluted solution is characterized by: 
 Options:  <1> All components comply with Raoult's law. <2> Only the solute complies with Raoult's law. <3> The solvent complies with Henry's law. <4> All components comply with Henry's law. <5> Only the solute complies with Henry's law.
Example Output: 1

Example Input: Question: Esters can be obtained from carboxylic acids and alcohols, by applying the Fischer esterification reaction in which: 
 Options:  <1> A base is used as a catalyst. <2> A ketone is used as the solvent. <3> A reducing reagent is used. <4> An oxidizing agent is used. <5> Acid catalysis is used.
Example Output: 5

Example Input: Question: Vitamin K is the specific antagonist for: 
 Options:  <1> Oral anticoagulants <2> Insulin. <3> Paracetamol. <4> Heparin. <5> Opiates
Example Output:
1