With increasing bond order,stability of a bond

Which of the following statements is not correct?
$I$) Bond length order: $H_2^- = H_2^+ > H_2$
$II$) $O_2^+, NO, N_2^-$ have the same bond order of $2.5$
$III$) Bond order can assume any value including zero up to four
$IV$) $NO_3^-$ and $BO_3^{3-}$ have the same bond order for the $X-O$ bond (where $X$ is the central atom)

Which pair among the following does not have the same bond order?

Observe the following molecules: $C_2, N_2, O_2, F_2$. Which one of the following statements is correct for the above molecules?

Which of the following electronic configurations is correct for the given species?

Which of the following molecular orbitals has the maximum number of nodal planes?