A) X-rays
B) \[\text{-}\]rays
C) \[\text{-}\]rays
D) \[\text{-}\]rays
Correct Answer: D
Solution :
As it is clear that penetrating power of \[\text{-}\]rays is few cm. While the penetrating power of\[\text{,}\text{,}\] and x-rays is in metre. Hence, the \[\text{-}\]rays has die minimum penetrating power.
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