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': "Which is true regarding site of Meckel's diveiculum: \nSelect and explain. \nA. 2 feet proximal to ileocaecal valve on mesentric border, B. 2 feet distal to duodenojejunal flexure on antimesentric border, C. 2 feet distal to D-3 flexure on mesentric border, D. 2 feet proximal to ileococcal valve on antimesentric border", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. 2 feet proximal to ileococcal valve on antimesentric border", 'role': 'assistant'}]