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: Social & Preventive Medicine
Radiation protection shields are made up of- 
Select and explain. 
A. Copper, B. Silver, C. Lead, D. Tin
C: Lead
Answer: C: Lead 
Explanation: Ans. is 'c' i.e., Lead o Effective preventive measure for high risk group e.g., X-ray technician is to use lead shields and lead rubber aprons.