What happens to the atomic radius of $p$-block elements as we move from left to right across a period in the periodic table?

Which of the following statements is incorrect?

Which of the following is the correct order of the ionic radii of the given ions?

Given below are two statements:
Statement $I$: The metallic radius of $Na$ is $1.86 \ \mathring{A}$ and the ionic radius of $Na^{+}$ is lesser than $1.86 \ \mathring{A}$.
Statement $II$: Ions are always smaller in size than the corresponding elements.
In the light of the above statements,choose the correct answer from the options given below:

Which among the following isoelectronic species has the smallest size?
$O^{2-}, F^{-}, Ne, Na^{+}, Mg^{2+}, Al^{3+}, Si^{4+}$

The correct order of atomic radii of the elements $O$,$N$,$S$ and $P$ is