Which of the following substances is isostructural with carbon dioxide $(CO_2)$?

When iodine is dissolved in aqueous potassium iodide,the shape of the species formed is

Given below are two statements:
Statement $(I) :$ For $ClF_3$,all three possible structures may be drawn as follows:
(Image provided)
Statement $(II) :$ Structure $III$ is most stable,as the orbitals having the lone pairs are axial,where the $\ell p-bp$ repulsion is minimum.
In the light of the above statements,choose the most appropriate answer from the options given below:

In which of the following sets,all the given species are isostructural?

The structures of $O_3$ and $N_3^-$ are

State the shapes of molecules that contain only bonding electron pairs around the central atom.