This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
[{'content': 'Most common cause of maternal moality - \nSelect and explain. \nA. Post paum hemorrhage, B. Eclampsia, C. Aboion, D. Infection', 'role': 'user'}, {'content': "Answer: A \nExplanation: Post pattum hemorrhage is the main cause of maternal deaths. It account for about 25%.REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 516", 'role': 'assistant'}]