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'.

Ex Input:
Question: The placenta is a derivative of: 
 Options:  <1> The zona pellucida. <2> The trophoblast. <3> The ectoderm <4> The mesoderm <5> The primitive line.

Ex Output:
2


Ex Input:
Question: How many pairs of spinal nerves are connected to the spinal cord? 
 Options:  <1> Twenty eight. <2> Twenty nine. <3> Thirty one. <4> Thirty-three. <5> Thirty-five.

Ex Output:
3


Ex Input:
Question: A confidence interval to estimate the population mean will be more precise when: 
 Options:  <1> The lower the confidence level. <2> The greater the dispersion of the sample. <3> The smaller the sample size. <4> The greater the typical sampling error. <5> The higher the confidence level.

Ex Output:

1