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 Q]: Question: The matrices of the composite materials can be:
Options: <1> Polymeric <2> Polymeric or metallic, but not ceramic. <3> Polymeric or ceramic, but not metallic. <4> Metallic or ceramic, but not polymeric. <5> Polymeric or metallic or ceramic.
[EX A]: 5

[EX Q]: Question: When administering oxygen therapy to a patient admitted to the emergency room due to exacerbated COPD, you should take into account that:
Options: <1> The flow of oxygen must be high, since respiratory failure is accompanied by hypoxia. <2> The concentration of oxygen is conditioned by the patient's clinical situation. <3> The concentration of oxygen must be equal to the atmospheric concentration, since the patient presents hypercapnia. <4> The flow should be low, since hypoxia is the only stimulus to breathe. <5> The flow must be adjusted to achieve a PO2 greater than 90 mmHg.
[EX A]: 4

[EX Q]: Question: A 25-year-old man consults for jaundice. He practices bodybuilding and has injected anabolic steroids substitutes for 17alkalkyl, three weeks before. For a tonsillitis he had taken amoxicillin-clavulanic acid which he removed 15 days ago. Analytical: AST 1200 IU / L (normal upper limit, lsn 40), ALT 1300 IU / L (lsn 40), GGT 150 IU / L (lsn 50), alkaline phosphatase 180 IU / L (lsn 105), total bililrubin 4 , 8 mg / dL with direct bilirubin predominance. Serology of virus B: Anti-HBs and Anti-HBc positive. Ultrasound suggests grade I steatosis. What is the most likely diagnosis?
Options: <1> Hepatitis by amoxicillin-clavulanic acid. <2> Anabolic steroid hepatitis. <3> Acute hepatitis B virus <4> Non-alcoholic steatohepatitis. <5> Cholestasis due to drugs.
[EX A]:
1