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 process of bacterial sporulation occurs: 
 Options:  <1> Both Gram positive and Gram negative bacteria. <2> After the depletion of certain essential nutrients. <3> When unfavorable environmental factors such as UV light or heat appear. <4> During the exponential growth. <5> By budding of a stem cell.
Example Output: 2

Example 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.
Example Output: 2

Example Input: Question: The structure of the personality can be organized according to: 
 Options:  <1> The three-dimensional model of R.B. Cattell. <2> The five-factor proposal of Zuckerman. <3> The five basic factors of Cantor and Kihstrom. <4> The sixteen factors of H.J. Eysenck. <5> The Monorrasgo theory of Costa and McCrae.
Example Output:
2