railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry Chemistry in Everyday Life

थर्मोडायनामिक रूप से कार्बन का सबसे स्थिर रूप है

1
हीरा
2
ग्रेफाइट 
3
फुलरीन
4
कोयला
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