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: Microbiology
[{'content': 'Ankylostoma duodenale commanly lives in: \nSelect and explain. \nA. Upper 1/3rd of duodenum, B. Lower 1/3rd of duodenum, C. Jejunum, D. Ileum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Jejunum', 'role': 'assistant'}]