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': 'The nematode which resides in the caecum and appendix is: \nSelect and explain. \nA. Ascaris lumbricoides, B. Mansonella ozzardi, C. Enterobius vermicularis, D. All of these', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Enterobius vermicularis', 'role': 'assistant'}]