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': "Brunner's gland are found in mucosa of \nSelect and explain. \nA. Stomach, B. Colon, C. Duodenum, D. Esophagus", 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Duodenum', 'role': 'assistant'}]