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': 'Infective form of entamoeba histolytica \nSelect and explain. \nA. Uninucleate cyst, B. Binucleate cyst, C. Quadrinucleate cyst, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Quadrinucleate cyst is the infective form.', 'role': 'assistant'}]