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
Which of the following is used in Brachytherapy: 
Select and explain. 
A. Rd, B. Id -125, C. Ir, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Brachytherapy:  Rd, Id – 125, Cs, Ir, Au used.
P-32, Strontium -89, Samarium-153, (NOT iridium -192) are used in systemic radionucluide
P-32 emits B-rays