The order of increasing sizes of atomic radii among the elements

As $<\mathrm{S}<\mathrm{O}<\mathrm{Se}$

$\mathrm{O}<\mathrm{S}<\mathrm{As}<\mathrm{Se}$

$\mathrm{Se}<\mathrm{S}<\mathrm{As}<\mathrm{O}$

$\mathrm{O}<\mathrm{S}<\mathrm{Se}<\mathrm{As}$