A 29-year-old unconscious young female was taken to the emergency department. Her liver function tests are ordered and show the following results:

Bilirubin: 161 mg/dL

ALP: 200 U/L

ALT: 11690 U/L

AST: 10490 U/L

Albumin: 25 g/dL

What is the most appropriate investigation that would lead to a diagnosis?

A. Hepatitis A serology

B. Hepatitis B serology/antigen

C. Abdominal ultrasound

D. Blood alcohol level

E. Paracetamol level

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