(c)
Carbon suboxide has linear structure with C$-$C bond length equal to 130 $\mathring{\mathrm{A}}$ and C$-$O bond length equal to 120 $\mathring{\mathrm{A}}$
$O = C = C = C = O\ \leftrightarrow^{-}O - C \equiv C - C \equiv O^{+}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.