This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rheumatoid Ahritis, Subject name: Medicine
[{'content': 'Which is the most common cause of death in rheumatoid ahritis? \nSelect and explain. \nA. Cardiovascular complications, B. Neurological complications, C. Lung disease complications, D. Haematological complications', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The overall moality rate of RA is two times greater than general population, with ischemic hea disease being the most common cause of death. The life expectancy is reduced by 7 years for men and 3 years for women.', 'role': 'assistant'}]