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': 'Recurrence of gestational trophoblastic tumor can be associated with all except: \nSelect and explain. \nA. Enlarged uterus, B. Persistent lutein cysts in ovaries, C. Plateau of hCG, D. Sub urethral nodule', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]