This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ultrasonography, CT, and MRI, Subject name: Radiology
Best investigation to see calcification is: 
Select and explain. 
A. CT, B. MRI, C. X-ray, D. USG
A: CT
Answer: A: CT 
Explanation: Ans: A (CT ?) Ref: Harrison !v Principles of internal medicine.18th edition.Explanation:CT is the best technique to detect pericardial calcification; however, overpenetrated films, conventional tomography, fluoroscopy, and MRI may be helpful.Plain radiographs have poor sensitivity for detection of coronary calcification and have a reported accuracy as low as 42%High-quality mammography is the best diagnostic tool for the identification of breast calcifications.