Answer:
Option C
Explanation:
Fullerenes are the allotropes of carbon also called Buckminster fullerenes.
They are cage-like spheroidal molecules with general formula , C2n (e.g., C60, C70 etc)
C60 or the buckyball consists of 60 C-atoms arranged in 20 six-membered and 12 five-membered rings of C- atoms giving it an appearance of a soccer ball.
Each C-atom in C60 is sp2 -hybridised forming $\sigma$-bonds with three other C-atoms. The fourth electron remains free and responsible for its conductivity.
