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': 'Rhinosporidiosis is caused by which of the following? \nSelect and explain. \nA. Fungus, B. Virus, C. Bacteria, D. Protozoa', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Rhinosporidiosis is caused by Rhinosporidium seeberi. This organism was previously considered to be a fungus. It is now identified to be an aquatic protistan protozoa parasite belonging to the class Mesomycetzoea. ( Ref Scott Brown, 8th edition, VOL 1, Pg no. 208 )', 'role': 'assistant'}]