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: With regard to child abuse, point out the aspects that indicate the non-accidental nature of injuries and suggest that they are due to mistreatment: 
 Options:  <1> Delay in asking for help or going to the consultation. <2> When the story of the accident or the facts is unconvincing. <3> The explanations given by the parents, separately, are discordant. <4> History with numerous accidents or traumatisms. <5> All the answers include situations that are associated with abuse.
Example Output: 5

Example Input: Question: Turbidimetry and nephelometry are non-spectroscopic techniques based on the dispersion of light, with interesting applications in biochemical analysis. The criteria to be taken into account when choosing between nephelometry and turbidimetry in the analysis of a sample containing particles in suspension are: 
 Options:  <1> The size of the suspended particles and the detector of the instrument. <2> The size of the suspended particles and the wavelength of the radiation used. <3> The wavelength of the radiation emitted and the shape of the suspended particles. <4> The size of the suspended particles and the color of them. <5> The color of the particles and their fluorescence.
Example Output: 2

Example Input: Question: Of the following pollutants, which has a greater affinity for hemoglobin producing alterations in brain, myocardial and muscular tissue? 
 Options:  <1> Carbon monoxide. <2> Carbon dioxide. <3> Nitric monoxide <4> Sulfur dioxide. <5> Ozone.
Example Output:
1