This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals in Radiology, Subject name: Radiology
[{'content': 'An absolute contraindication of MRI is - \nSelect and explain. \nA. Pacemaker, B. Prosthetic cardiac valves, C. Insulin pump, D. Choclear implants', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cardiac pacemakers are the absolute contraindications of MRI. Also rememeber : Other absolute contraindications : metallic foreign bodies cerebral aneurysmal clips implanted electrodes', 'role': 'assistant'}]