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': 'Which of the following findings are highly predictive of placenta accreta \nSelect and explain. \nA. Large intraplacental lakes; fundal placenta., B. Less than 1mm between uterine serosa - bladder interface and retroplacental vessels ; lateral placenta., C. Less than 1 mm between uterine serosa - bladder interface and retroplacental vessels ; large placental lakes., D. None of the above.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: If distance between uterine serosa-bladder wall interface and retroplacental vessels is <1mm and if there are large intraplacental lacunae\xa0→ placenta accreta is likely.', 'role': 'assistant'}]