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a
Fullerene
b
Graphite
c
Carbonate ion
d
Dry ice
answer is D.
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Detailed Solution
Dry ice is a solid CO2 with ‘sp' hybridised carbon;Electron pairs=12V+M-C+A; For carbon, group number(V)=4; Number of monovalent gps attached to central atom(M)=0 ; Charge of cation(C)=0; Charge of anion(A)=0; Thus Electron pairs=12×4=2 ; 2 electron pairs on central atom means 'sp' hybridization;