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': 'Which of the following are the sites of poo-systemic anastomosis? \nSelect and explain. \nA. Umbilicus, B. Lower end of oesophagus, C. Rectum and anal canal, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Poosystemic anastomosis is also seen in the bare area of liver and posterior abdominal wall.', 'role': 'assistant'}]