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 hepatitis viruses is a subsidiary of treatment with viral protease inhibitors?
Options: <1> The hepatitis C virus <2> The hepatitis B virus <3> The hepatitis A virus <4> The hepatitis E virus <5> The TTV virus.
Example Output: 1

Example Input: Question: What group of amino acids, when they are part of the proteins, can be phosphorylated?
Options: <1> Val, Ser, Thr. <2> Phe, Ala, Gly. <3> Val, Glu, Asp. <4> Tyr, Ser, Thr. <5> Lys, Ser, Ile.
Example Output: 4

Example Input: Question: The water used in the preparation of medicated syrups must:
Options: <1> Be sterile <2> Be purified or distilled water. <3> It is highly recommended that it contain dissolved carbon dioxide. <4> Contain dissolved calcium ions. <5> Contain an adequate proportion of magnesium ions.
Example Output:
2