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: What is the approach proposed by the relationship model between therapist and client as expert to expert ?: 
 Options:  <1> The behavioral model. <2> The constructivist perspective <3> The psychoanalysis. <4> The strategic school. <5> The therapy centered on the client.
Example Output: 2

Example Input: Question: What is the maximum number of stereoisomers of an aldohexose? 
 Options:  <1> two. <2> Four. <3> 8 <4> 16 <5> 32
Example Output: 4

Example Input: Question: In what units is usually expressed the coefficient of molar absorptivity? 
 Options:  <1> mL mol-1 cm. <2> L mol-1 cm-3. <3> Photons per mole. <4> M-1 cm-1. <5> It is dimensionless.
Example Output:
4