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': 'In pyogenic liver abscess commonest route of spread is \nSelect and explain. \nA. Hematogenous through poal vein, B. Ascending infection through biliary tract, C. Hepatic aery, D. Local spread', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Routes of spread 1st most common - Biliary tract 2nd most common - poal vein', 'role': 'assistant'}]