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
SI unit of radioactivity is: March 2013 (c, f) 
Select and explain. 
A. Rem, B. Rad, C. Becuerel, D. Curie
C: Becuerel
Answer: C: Becuerel 
Explanation: Ans. C i.e. Becquerel