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: If after establishing the confidence interval with respect to a difference between two independent means, we find that the zero value is not in the interval: 
 Options:  <1> We can not make any decision regarding the null hypothesis of equality of means. <2> We can not reject the null hypothesis of equality between population means. <3> We must reject the null hypothesis of equality between population means. <4> We accept the null hypothesis of equality between the population means. <5> We reject the alternative hypothesis of equality between population means.
Example Output: 3

Example Input: Question: The delirious atmosphere is defined as: 
 Options:  <1> The delirious interpretation of a normal perception. <2> A self-referential idea, of great importance for the patient. <3> Subjective experience that the world has changed in a subtle but sinister, disturbing and difficult or impossible to define way. <4> The delirious construction of a memory. <5> A rational and easily modifiable idea about an environmental issue.
Example Output: 3

Example Input: Question: As the degrees of freedom increase, the Student's t distribution approaches: 
 Options:  <1> The normal distribution. <2> The binomial distribution. <3> The F distribution of Snedecor. <4> The uniform distribution. <5> The Chi square distribution.
Example Output:
1