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': "Post paum hemorrhage is blood loss of 500 cc or more within : \nSelect and explain. \nA. 6 hours of the beginning of 3rd stage of labour, B. 12 hours of the beginning of 3'd stage of labour, C. 18 hours of the beginning of 3rd stage of labour, D. 24 hours of the beginning of 3'd stage of labour", 'role': 'user'}, {'content': "Answer: D \nExplanation: 24 hours of the beginning of 3'd stage of labour", 'role': 'assistant'}]