In 4s, 4p, 4d, 3d orbitals, which one has least energy ?

Among 3d, 4s, 4p orbitals, which one has least orbital energy ? Why ?

Among 3p, 4s, 3d, 4p orbitals which has least energy ?

Among 3d, 4s, 4p orbitals, which one fills last by an electron? And why?

Among 3s, 3p,4s, 3d which has lowest energy?

4s orbitals has less energy than 3d orbital

4s orbitals has less energy than 3d orbital

4s orbitals has less energy than 3d orbital

Arrange the 1s, 2s, 4s, 3p, 4p and 3d orbitals according to increasing order of energy .

What is the sequence of energies of 4s, 4p, 4d and 4f-orbitals in (i) a hydrogen atom and (ii) a zinc atom ?