Consider the following pairs.

$$ \begin{array}{l|l|l} \hline & \text { Order } & \text { Property } \\ \hline \text { (A) } & \mathrm{NO}_2>\mathrm{O}_3>\mathrm{H}_2 \mathrm{O} & \text { Bond angle } \\ \hline \text { (B) } & \mathrm{HF}>\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3 & \text { Dipole moment } \\ \hline \text { (C) } & \mathrm{I}_2>\mathrm{F}_2>\mathrm{N}_2 & \text { Bond length } \\ \hline \end{array} $$

Which of the above pairs are correctly matched?

In which of the following, molecules are arranged in the increasing order of their bond angles?

Arrange the molecules $\mathrm{B}_2, \mathrm{He}_2, \mathrm{~N}_2$ and $\mathrm{C}_2$ in the increasing order of their bond order values.

According to molecular orbital theory, the molecule which contains only $\pi$-bonds between the atoms is