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: Radiology
[{'content': "Which of the following lesion has radiographic Soap bubble appearance, with a characteristic feature of 'Pumping action' \nSelect and explain. \nA. CGCG., B. Central hemangioma., C. Ameloblastoma., D. OKC.", 'role': 'user'}, {'content': 'Answer: B \nExplanation: "Pumping action" is characteristic clinical feature. If tooth in the region of tumour is pushed into the tumor, it will rebound back to the original.', 'role': 'assistant'}]