This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': '3.Rhinosporidiosis is caused by: \nSelect and explain. \nA. Fungus, B. Virus, C. Bacteria, D. Protozoa', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It has long been considered to be a fungus but it has been difficult to classify this organism. It has not been cultured so far. Some consider it to be a protozoa or a fish parasite belonging to DRIP clade (Dermocystidium, Rosette agent, Ichthyophonus and Psorospermum). Ref: Dhingra 7e pg 177.', 'role': 'assistant'}]