$\mathrm{I}>\mathrm{Br}>\mathrm{Cl}>\mathrm{F}$

$\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$

$\mathrm{Br}>\mathrm{Cl}>\mathrm{F}>\mathrm{I}$

$\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}$

$\mathbf{A}$ is not correct but $\mathbf{R}$ is correct

Both $\mathbf{A}$ and $\mathbf{R}$ are correct and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$

Both $\mathbf{A}$ and $\mathbf{R}$ are correct and $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$

$\mathbf{A}$ is correct but $\mathbf{R}$ is not correct.

$\mathrm{P}<\mathrm{Si}<\mathrm{Be}<\mathrm{Mg}<\mathrm{Na}$

$\mathrm{P}<\mathrm{Si}<\mathrm{Na}<\mathrm{Mg}<\mathrm{Be}$

$\mathrm{P}<\mathrm{Mg}<\mathrm{Be}<\mathrm{Si}<\mathrm{Na}$

$\mathrm{Be}<\mathrm{Si}<\mathrm{P}<\mathrm{Mg}<\mathrm{Na}$

The largest and the smallest species among $\mathrm{Mg}, \mathrm{Mg}^{2+}, \mathrm{Al}$ and $\mathrm{Al}^{3+}$ are Al and $\mathrm{Mg}^{2+}$ respectively.

The IUPAC name of the element with atomic number 107 is Unnilseptium.

The similarity in behaviour of Li with Mg is referred to as 'diagonal relationship'

The oxidation state and covalency of Al in $\left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+}$ are 3 and 6, respectively.