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: Which of the following conditions causes a decrease in the O2 saturation of the hemoglobin that is not due to a decrease in the partial pressure of oxygen? 
 Options:  <1> Ventilation-perfusion ratio lower than normal. <2> Anemia. <3> Carbon monoxide poisoning. <4> Hypoventilation. <5> Shunt venoarterial.
[A]: 3


[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: After a traffic accident, a 38-year-old patient enters the ICU in a coma. After several days the patient does not improve neurologically and CT shows hemorrhagic punctate lesions in the corpus callosum and cortico-subcortical union. What is your diagnosis? 
 Options:  <1> Acute subdural hematoma. <2> Thrombocytopenic purpura. <3> Cerebral hemorrhagic contusion. <4> Severe diffuse axonal injury. <5> Hypoxic-ischemic encephalopathy.
[A]:
4