Choose the correct statements regarding $\mathit{\text{'}}\psi \mathit{\text{'}}$.

Boundary surface diagram for an s-orbital is actually a sphere centered on the nucleus.

The boundary surface for $|\psi {|}^2$ and $\left|\psi \right|$ are identical.

If probability density $|\psi {|}^2$ is constant on a given surface $\left|\psi \right|$ is also constant over the surface

2s-orbital probability density first decreases sharply to zero and again starts increasing.