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': 'Regarding Placenta praevia, false statement among the following is - \nSelect and explain. \nA. Presents commonly in the 3rd trimester, B. Painful vaginal bleeding, C. Usg is the investigation of choice, D. Increased maternal age is a risk factor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans-B', 'role': 'assistant'}]