Question

Which of the following is radioactive?

A) 10-¹⁰to 10-⁸cm

B) 10-⁷to 10-⁵ cm

C) 10⁵ to 10⁷cm

D) 10² to 10³ cm​

Answer 1

Answer:

I think C is the correct answer

Answer 2

Answer:

my answer is c in my calculation