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: Consider Input: 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.

Output: 1


Input: Consider Input: Question: What thrombophilia study would be of interest to a woman with repeat abortions? 
 Options:  <1> Determination of fibrinogen. <2> C-reactive protein. <3> PAI-1. <4> Lupus anticoagulant. <5> Reptile time.

Output: 4


Input: Consider Input: Question: When memory adapts to the presence of a drug (eg, subsensitizing receptors, synthesizing new membrane proteins) in such a way that the ability of the drug (eg, in alcohol to disrupt neuronal membranes) is increasingly minor, we are talking about: 
 Options:  <1> Psychological tolerance <2> Cross tolerance <3> Metabolic tolerance <4> Pharmacological tolerance. <5> Reduced tolerance


Output: 4