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Q.1 3. आयोनियम और रेडियम के बीच क्या रिश्ता है?

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Q.2 4. रेडियम किस प्रजा से दुखी है?

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Q.3 1. अग्निकुंड सिकुड़कर क्या बन गया?

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Q.4 2. रेडियम की मित्रता किससे होती है?