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
Walls of CT scan rooms are coated with- 
Select and explain. 
A. Lead, B. Glass, C. Tungsten, D. Iron
A: Lead
Answer: A: Lead 
Explanation: Ans. is 'a' i.e., Lead * Lead is the most common agent used in modern constructions (Room design) to offer radiation shielding.* Computed tomography is a special type of x-ray procedure. A1 the precautions are same as X-rays.