The order of increasing sizes of atomic radii among the elements
Question:

The order of increasing sizes of atomic radii among the elements $\mathrm{O}, \mathrm{S}, \mathrm{Se}$ and $\mathrm{As}$ is ?

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

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

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

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

Correct Option: , 4

Solution:

Solution Not Required