Arrange the following radiations in order of decreasing penetration power:
A) α-rays
B) β-rays
C) γ-rays

• A. α-rays > β-rays > γ-rays
• B. β-rays > γ-rays > α-rays
• C. α-rays > γ-rays > β-rays
• D. γ-rays > α-rays > β-rays
• E. β-rays > α-rays > γ-rays
• F. γ-rays > β-rays > α-rays

Answer: (F)