निम्नलिखित में से किस विकि – McqOptions

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1.	निम्नलिखित में से किस विकिरण में सबसे कम तरंगदैर्ध्य होता है -
A.	अल्फा - किरणें
B.	एक्स - किरणें
C.	गामा - किरणें
D.	बीटा - किरणें
Answer» D. बीटा - किरणें

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