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: Which of the following characteristics is NOT typical of the contents of obsessive ideas? 
 Options:  <1> Sexual thoughts <2> Phonemes <3> Need for symmetry. <4> Pathological doubt. <5> Pollution.

Ex Output:
2


Ex Input:
Question: Sodium metal reacts violently with water because Na: 
 Options:  <1> Oxidize the water to oxygen, and the reaction is very exothermic. <2> It reduces the water to hydrogen, and the reaction is very exothermic. <3> Oxidizes the water to oxygen, and when a gas is generated, the entropy increases enormously. <4> It reduces the water to hydrogen, and the reaction is very endothermic. <5> It combines with water giving rise to an explosive hydride.

Ex Output:
2


Ex Input:
Question: Which of the following structures belongs to the peritoneum ?: 
 Options:  <1> The dura mater. <2> The greater omentum. <3> The pleura <4> The pericardium. <5> The spleen

Ex Output:

2