Which of the following is/are correct energy order for H-atom?

Options

A. `1s lt 2s lt 2p lt 3s lt 3p`
B. `1s lt 2s = 2p lt 3s = 3p`
C. `1s lt 2p lt 3d lt 4s`
D. `1s lt 2s lt 4s lt 3d`

Answer

B, C

Explanation

In H-atom, all are degenerate orbitals in a given main shell