state gov Tamil Nadu Police SI (TNUSRB) Mock Test Series 2024 General Science Chemistry Periodic Table

खालीलपैकी कोणता पर्याय अयोग्यरित्या जुळला आहे?

1
कार्बोरंडम - SiC
2
कोरंडम - AI2O3
3
सिलिका - Si
4
हिरा - Cn
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