Definition: 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'.
Input: Question: The square of Pearson's correlation coefficient is: 
 Options:  <1> The coefficient of variation. <2> The coefficient of determination. <3> The slope of the regression line. <4> The regression coefficient. <5> The covariance.
