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
Which is the most common cause of death in rheumatoid ahritis? 
Select and explain. 
A. Cardiovascular complications, B. Neurological complications, C. Lung disease complications, D. Haematological complications
A: Cardiovascular complications
Answer: A: Cardiovascular complications 
Explanation: 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.