The material used for safety from nuclear radiation is -

Correct answer: Lead

Explanation: ✅ Correct Answer: A) Lead 📚 Explanation: Lead ($\text{Pb}$) is a dense, heavy metal that is highly effective at absorbing and blocking harmful ionizing radiation, such as gamma rays and X-rays. Because of its high atomic number and density, it is the standard material used to construct radiation shields and protective clothing. Nuclear laboratory workers wear lead aprons to minimize exposure to hazardous rays. This shielding capability makes it essential for safety protocols in nuclear power plants and medical radiology departments.