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': 'Malignant neoplasms shows all the following features EXCEPT \nSelect and explain. \nA. Disorganized cell structure, B. Encapsulation, C. Invasion of blood vessels, D. Rapid, erratic growth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]