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'.

Q: Question: Indicate which of the following statements is true about bilirubin: 
 Options:  <1> It is a catabolic product of the heme group. <2> It is a product of the urea cycle. <3> It is an intermediary of the Krebs cycle. <4> It is a precursor of hepatic gluconeogenesis. <5> It is a product of cholesterol degradation.

A: 1
****
Q: 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.

A: 2
****
Q: Question: When the cutoff point of a diagnostic instrument is very high, the risk of: 
 Options:  <1> False positives. <2> False negatives. <3> True positives. <4> Sensitivity of the test. <5> Inconsistencies of validity.

A:
2
****