Which has the least penetrating power [CPMT 1994]

1.	Which has the least penetrating power [CPMT 1994]
A.	\[\beta \]-rays
B.	\[\alpha \]-rays
C.	\[\gamma \]-rays
D.	\[X\]-rays
Answer» C. \[\gamma \]-rays

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Which has the least penetrating power [CPMT 1994]

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