$C{O}_2$ has the same Geometry as   

$A) HgC{l}_2$    $b) N{O}_2$     $c) SnC{l}_4$    $D) C_2{H}_2$

$O=C=O$ $sp-$hybrid orbitals; linear $HgC{l}_2\to Cl-Hg-Cl: \mu =0,$ linear 

 $\mu =0, s{p}^3$ hybridization trigonal planar
$H-C=CH; \mu =0,$ linear