Which of the following statement(s) is/are true for the given species :  ${\mathrm{N}}_2,\mathrm{CO},{\mathrm{CN}}^{-}$ and ${\mathrm{NO}}^{+}$ ?

A non-polar substance is ${\mathrm{N}}_2$. As a result, it lacks a dipole moment.

There are no unpaired electrons in ${\mathrm{N}}_2$. It is therefore not paramagnetic.

Each species' valence shell has 14 electrons. As a result, every species is isoelectronic.
As a result, assertion A is true.
Additionally, every species is linear.
Option C is right as a result.

${\mathrm{N}}_2,\mathrm{CO},{\mathrm{CN}}^{-}$ and ${\mathrm{NO}}^{+}$ are diamagnetic in nature.