This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'The commonest cause of death in the sophisticated world- \nSelect and explain. \nA. Ischemic hea disease, B. Accidents, C. Infectious disease, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The prevalence of IHD among adults was estimated at 96.7 per 1000 population in urban and 27.1 in rural areas. Ref- Park&;s textbook of Preventive and Social Medicine 24th edition.', 'role': 'assistant'}]