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: Unknown
[{'content': 'Contraindication for dilatation and curettage: \nSelect and explain. \nA. TB Endometrium, B. Acute PID, C. Post-menopausal bleeding, D. Carcinoma endometrium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. The Short Textbook of Pediatrics. Pg 650\n\xa0\nDilation and Curettage\nIndications\n\nRetained placenta after vaginal delivery (postpartum)\nRetained products of conception after missed, incomplete, or inevitable abortion/miscarriage\nElective first-trimester abortion\nMolar pregnancy\nEvaluation of abnormal uterine bleeding\n\nContraindication\n\nUntreated acute pelvic infection (endometritis, salpingitis, pyometra)\nCoagulopathy\nPossible fetal viability (except for elective termination)\nPatient refusal', 'role': 'assistant'}]