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': '"Autoinfection" is seen with: \nSelect and explain. \nA. Ascaris, B. Strongyloides, C. Giardia, D. Gnasthostoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Strongyloides', 'role': 'assistant'}]