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: Radiology
Radiation emitts by Ir-192: 
Select and explain. 
A. 0.5 Mev, B. 0.6 Mev, C. 0.66 Mev, D. 0.47 Mev
D: 0.47 Mev
Answer: D: 0.47 Mev 
Explanation: D i.e. 0.47 Mev