Which of the following is true for carbon suboxide $(C_3O_2)$?

$A$ molecule is square planar and has no lone pairs. What type of hybridization is it associated with?

The hybridization in $PF_3$ is

Match the compounds given in $Column\, I$ with the hybridisation and shape given in $Column\, II$ and mark the correct option.

$Column\, I$	$Column\, II$
$(A)\, XeF_6$	$(i)\, \text{Distorted octahedral}$
$(B)\, XeO_3$	$(ii)\, \text{Square planar}$
$(C)\, XeOF_4$	$(iii)\, \text{Pyramidal}$
$(D)\, XeF_4$	$(iv)\, \text{Square pyramidal}$

Which of the following statements are true about the $S_8$ molecule?
$I.$ There are no $p_{\pi}-p_{\pi}$ bonds present in the molecule.
$II.$ There are eight lone pairs of electrons in total.
$III.$ Each $S$ atom is $sp^3$ hybridized.

The hybridization state of $C$ atoms in but$-2-$enedioic acid is