This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'The following is not a feature of malignant transformation by cultured cells \nSelect and explain. \nA. Increased cell density, B. Increased requirement for growth factors, C. Alteration of cytoskeletal structures, D. Loss of anchorage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Malignant cells do not require stimulation by growth signals. they have capacity to proliferate without it.', 'role': 'assistant'}]