In gamma ray emission from a nucleus,

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(A) Gamma $(\gamma)$ emission occurs when a nucleus in an excited state transitions to a lower energy state or the ground state. During this process,t

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there is no change in the proton number and the neutron number

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(A) Gamma $(\gamma)$ emission occurs when a nucleus in an excited state transitions to a lower energy state or the ground state. During this process,the nucleus emits a high-energy photon known as a $\gamma$-ray. Since $\gamma$-rays have zero charge and zero rest mass,the emission does not alter the atomic number $(Z)$ or the mass number $(A)$ of the nucleus. Therefore,the number of protons and neutrons remains unchanged.

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