This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'M/c cause of APH is \nSelect and explain. \nA. Placenta pre, B. Abruptio placenta, C. Vasa pre, D. Placenta accreta', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Abruptio placenta is defined as the haemorrhage occurring in pregnancy due to separation of a normally situated placenta.It is also called accidental haemorrhage or premature separation of placenta (refer pgno:133 sheila textbook of obstetrics 2 nd edition)', 'role': 'assistant'}]