This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Trophoblastic Disease, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is the most common cause of persistent trophoblastic disease after H. Mole evacuation? \nSelect and explain. \nA. Choriocarcinoma, B. Invasive mole, C. Placental site trophoblastic tumor, D. Residual Mole', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Residual MoleUpto 20% of women with H. Mole show persistence of tumor in uterus following surgical evacuation.a. 15% persist as persistant or residual mole.b. 5% develop choriocarcinoma.c. Trophoblastic tumors diagnosed for upto 6 months following an abortion or mole is often. An invasive mole, but the one diagnosed after 6 months is usually choriocarcinoma.d. It is to be noted that trophoblastic tumor developing after a full-term pregnancy is always a choriocarcinoma.', 'role': 'assistant'}]