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: Pathology
[{'content': 'One of the following is not a malignant feature \nSelect and explain. \nA. Aplasia, B. Anaplasia, C. Abnormal mitosis, D. Pleomorphism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]