Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 General Knowledge Science Technology and Inventions

संशोधकांच्या मते, शुद्ध कार्बनच्या पहिल्या स्थिर रिंगमध्ये किती अणू असतात?

1
18
2
60
3
80
4
28
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