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': 'Which of the following is true about mature cysts of E. histolytica - \nSelect and explain. \nA. Endoplasm and ectoplasm are clearly defined, B. Eight chromatid bodies, C. Shows chromatid bodies and glycogen mass, D. Nuclear structure retains characteristics of trophozoite', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]