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': 'G-cells are present mostly in- \nSelect and explain. \nA. Fundus, B. Cardia, C. Pyloric antrum, D. Body', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]