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
One of the following is not a malignant feature 
Select and explain. 
A. Aplasia, B. Anaplasia, C. Abnormal mitosis, D. Pleomorphism
A: Aplasia
Answer: A: Aplasia 
Explanation: None