This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
MRI is unsuitable for: 
Select and explain. 
A. Cardiac pacemakers, B. Metallic clips, C. Woody items, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: (All of the above) (19-Sutton 7th)MAGNETIC RESONANCE IMAGINGADVANTAGESDISADVANTAGES* It is non-invasive technique* It is safe as it does not involve the use of ionising radiation* There is no adverse biological effect.* Images can be readily produced in any plane eg. Axial sagittal or coronal without changing position of the patient* It gives high intrinsic contrast* Very high cost of imaging* Inability to image bone and calcium* It is unsuitable for patients with cardiac pacemakers and other ferromagnetic implants.* Imaging time is long, hence movement or motion artifacts are quite like.* Highly operator dependent, hence require technical expertise