engineering recuitment NCRTC Junior Engineer Mock Test Series 2025 General Knowledge Science Technology and Inventions

रेडियोधर्मिता शब्द किसने गढ़ा?

1
मैरी क्यूरी
2
नील्स बोहर
3
रिचर्ड फेनमैन
4
मार्सेलो माल्पीघी
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