state gov Bihar Police Prohibition Constable 2022 Mock Test Series General Science Chemistry Periodic Table

खालीलपैकी कोणते कॅल्शियम कार्बोनेटचे स्वरूप नाही?

1
संगमरवर
2
चुनखडक 
3
खडू 
4
काळा दगड
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