Question: The order of increasing sizes of atomic radii among the elements $\mathrm{O}, \mathrm{S}, \mathrm{Se}$ and $\mathrm{As}$ is ?
As $<\mathrm{S}<\mathrm{O}<\mathrm{Se}$
$\mathrm{O}<\mathrm{S}<\mathrm{As}<\mathrm{Se}$
$\mathrm{Se}<\mathrm{S}<\mathrm{As}<\mathrm{O}$
$\mathrm{O}<\mathrm{S}<\mathrm{Se}<\mathrm{As}$
Correct Option: , 4
Solution:
Solution Not Required
