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: Surgery
[{'content': "Most common presentation of Meckel's diveiculum? \nSelect and explain. \nA. Lower GI bleeding, B. Upper GI bleeding, C. Diarrhorea, D. Abdominal pain", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Lower GI bleeding", 'role': 'assistant'}]