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: Pharmacology
In treatment of Papillary Carcinoma thyroid, Radioiodine destroys the neoplastic cells predominantly by- 
Select and explain. 
A. X rays, B. b rays, C. g rays, D. a paicles
B: b rays
Answer: B: b rays 
Explanation: Ans. is 'b' i.e., b rays