16. नाभिकीय रियेक्टर में मंदक है
(A) कैडमियम (B) भारी जल
(C) यूरेनियम-238 (D) यूरेनियम-235
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heavy water is controlling substance in nuclear reactor to control the secretion of netrons
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your question is not clear
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if you mark me as brainlist i will follow u and mark u as brainlist when you answer my
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