This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Least common presentation of HCC \nSelect and explain. \nA. PUO, B. Mass, C. Jaundice, D. Weakness', 'role': 'user'}, {'content': 'Answer: A \nExplanation: On rare occasions, HCC can present as a rupture with the sudden onset of abdominal pain followed by hypovolemic shock secondary to intraperitoneal bleeding Other rare presentations include hepatic vein occlusion (Budd-Chiari syndrome), obstructive jaundice, hemobilia or fever of unknown origin(PUO) Ref: Sabiston 20th edition Pgno : 1459', 'role': 'assistant'}]