A 34-year-old woman presents with increasingly frequent brief, shock-like jerking movements of her trunk and upper extremities lasting less than one second. She developed acute hepatic failure two weeks ago following mushroom poisoning. Vital signs: BP 128/82, HR 92, RR 18, Temp 37.2°C, SpO2 98%. Laboratory studies reveal elevated ammonia at 95 μmol/L and prolonged prothrombin time. Neurologic examination shows no focal deficits. She denies recent seizures. Which of the following is the most likely diagnosis?

1. A)MyoclonusGABARITO
2. B)Athetosis
3. C)Hemiballismus
4. D)Chorea
5. E)Dystonia