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: 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: Generates hydrogen peroxide in the phagosome: 
 Options:  <1> Myeloperoxidase <2> Carbonic anhydrase. <3> NADPH oxidase. <4> Cytochrome C oxidase. <5> Superoxide dismutase.
Example Output: 5

Example Input: Question: T. R. of 89 years, presents instability and has suffered a fall. Regarding falls in older people, it is correct that: 
 Options:  <1> Most falls are produced by performing dangerous activities. <2> The factors that most influence the risk of falls are the intrinsic factors influenced by the underlying diseases. <3> The factors that most influence the risk of falls are those related to the changes of aging. <4> It assumes a higher risk of falling down stairs than down stairs. <5> The factors that most influence the genesis of falls in fragile elderly are the extrinsic ones.
Example Output:
2