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: Medicine
[{'content': 'A 32 year old man is Stable 1 year Post - kidney transplant . Which of the following Complications of Transplantation is the most likely cause of death \nSelect and explain. \nA. Atherosclerosis, B. Opportunistic infection, C. Lymphoma, D. Persistent hyperparathyroidism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: m/c Cause of death is Cardiovascular.', 'role': 'assistant'}]