The radius of which ion is closest to that of $Li^{+}$ ion?

Which of the following sequences is the correct order of the size of species?

The increasing order of atomic radii of the following Group $13$ elements is:

Assertion $(A)$: $Mg^{2+}$ and $Al^{3+}$ are isoelectronic but the magnitude of the ionic radius of $Al^{3+}$ is less than that of $Mg^{2+}$.
Reason $(R)$: The effective nuclear charge on the outermost electrons in $Al^{3+}$ is greater than that in $Mg^{2+}$.
The correct option among the following is:

Observe the following data.

Ion	Radius $(pm)$
$Q^{a+}$	$53$
$X^{b+}$	$66$
$Y^{c+}$	$40$
$Z^{d+}$	$100$

$Q^{a+}, X^{b+}, Y^{c+}, Z^{d+}$ are respectively

Among the ions $O^{2-}, Na^{+}, F^{-}, N^{3-}, Mg^{2+}$,the ions with the smallest and largest radii are respectively: