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: The reaction of an alkene with metachloroperbenzoic acid causes a cyclic ether which is called: 
 Options:  <1> Furano <2> Dioxane <3> Epoxide <4> Azirano <5> Lactone
Example Output: 3

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: Which of the following traumatic injuries requires, in order to avoid local complications, an earlier treatment? 
 Options:  <1> Posterior traumatic luxation of the hip. <2> Displaced fracture of the femoral neck of the elderly. <3> Trochanteric fracture of the elderly. <4> Cup fracture. <5> Subtrochanteric fracture.
Example Output:
1