Among the elements $Ca, Mg, P$ and $Cl,$ the order of increasing atomic radii is

Which of the following species will have the largest and the smallest size?
$Mg$,$Mg^{2+}$,$Al$,$Al^{3+}$

Given two statements below :
Statement $I:$ In $Cl_2$ molecule the covalent radius is double of the atomic radius of chlorine.
Statement $II:$ Radius of anionic species is always greater than their parent atomic radius.
Choose the most appropriate answer from options given below :

The correct order of atomic radii of $N$,$F$,$Al$,and $Si$ is:

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: The ionic radii of $O^{2-}$ and $Mg^{2+}$ are same.
Reason $R$: Both $O^{2-}$ and $Mg^{2+}$ are isoelectronic species.
In the light of the above statements,choose the correct answer from the options given below:

Identify the correct order of ionic radii of the given species.