This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Uterine bleeding at 12 weeks gestation without any cervical dilation is an indication of \nSelect and explain. \nA. Incomplete aboion, B. Threatened aboion, C. Missed aboion, D. Inevitable aboion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bleeding occurs in about 30 to 40%of human gestations before 20 weeks of pregnancy, with about half of these pregnancies ending in spontaneous aboion. A threatened aboion takes place when this uterine bleeding occurs without any cervical dilation or effacement', 'role': 'assistant'}]