परमाणु घड़ी निम्नलिखित मे� – McqOptions

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1.	परमाणु घड़ी निम्नलिखित में से किसके संक्रमण पर आधारित होती है -
A.	मैग्नीशियम
B.	सीजियम
C.	सोडियम
D.	एल्युमीनियम
Answer» C. सोडियम

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