कौन-से क्षय में द्रव्यमान संख्या बदलती है? (A) \( \alpha \)-क्षय (B) \( \beta^{-} \)-क्षय (C) \(...

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कौन-से क्षय में द्रव्यमान संख्या बदलती है?
(A) \( \alpha \)-क्षय
(B) \( \beta^{-} \)-क्षय
(C) \( \beta^{+} \)-क्षय
(D) \( \gamma \)-क्षय
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