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: Gynaecology & Obstetrics
[{'content': 'Color doppler TVS of Endometrioma demonstrates \nSelect and explain. \nA. Intracystic flow, B. Pericystic flow, C. Diffuse blood flow, D. None of above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Endometrioma demonstrates pericystic flow.', 'role': 'assistant'}]