This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': "Watershed line in anal canal ? \nSelect and explain. \nA. Hilton's line, B. Pectinate line, C. Mucocutaneous junction, D. None", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pectinate linePectinate line forms the water-shed line of anal canal.Area above pectinate line drains into internal iliac nodes and area below it drains into superficial inguinal nodes.", 'role': 'assistant'}]