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': 'Point B in treatment of Ca cervix corresponds to \nSelect and explain. \nA. Mackenrodts ligament, B. Obturator Lymph node, C. Isheal tuberosity, D. Round ligament', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Obturator Lymph node', 'role': 'assistant'}]