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: As an immunoanalytical technique, flow cytometry is mainly based on the detection of signals: 
 Options:  <1> Chemiluminescent <2> Fluorescent <3> Bioluminescent <4> Piezoelectric. <5> Magnetic

Ex Output:
2


Ex Input:
Question: Catalase: 
 Options:  <1> Acts on hydrogen peroxide. <2> It results in the formation of hydrogen peroxide. <3> It acts on the superoxide anion. <4> It converts hydrogen peroxide into superoxide anion. <5> Use glutathione as a cofactor.

Ex Output:
1


Ex Input:
Question: How many palindromic sequences exist on the human Y chromosome that allow Y-Y recombination ?: 
 Options:  <1> 8 <2> 6 <3> Four. <4> 10 <5> 12

Ex Output:

1