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': 'LN involved in cervical cancer : \nSelect and explain. \nA. External Iliac LN, B. Obturator LN, C. Hypogastric LN, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is a, b and c i.e. Obturator LN; Hypogastric LN; and External iliac LN', 'role': 'assistant'}]