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': 'Infection by which of the following does not effect eye: \nSelect and explain. \nA. Onchocercera, B. Trypanosoma, C. Tinea solium, D. Trichuris', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Trichuris', 'role': 'assistant'}]