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
Mathematical representation of inverse square law is 
Select and explain. 
A. I2/I1 = (D2)2 / (D1)2, B. I1/I2 = (D2)2 / (D1)2, C. I2/I1 = (D2) / (D1), D. I1/I2 = (D2) / (D1)
B: I1/I2 = (D2)2 / (D1)2
Answer: B: I1/I2 = (D2)2 / (D1)2 
Explanation: None