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': 'The most impoant cause of the coagulation failure in obstetrics is: September 2012 \nSelect and explain. \nA. Intrauterine fetal death, B. Accidental hemorrhage, C. Placenta pre, D. Rupture of the uterus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Accidental hemorrhage Abruptio placentae Painful, due to pre-eclampsia or trauma, continuous bleeding Fetal hea sounds usually absent Placenta is present in upper segment, No Malpresentation Bleeding may be revealed, concealed or mixed Uterus is tense, tender, and rigid.', 'role': 'assistant'}]