Bohr's theory is not applicable to-

For which of the following species Bohr's theory is not applicable?

Bohr theory is not applicable for

Bohr theory is not applicable for

Consider the following statements (I) Bohr's theory can also be used to explain the spectra of He^(+) ion (II) Energy of an electron in the first Bohr orbit of hydrogen atom is -13.6eV (III) Bohr's theory is only applicable to hydrogen atom and not to any other species (IV) The energy of an electron in a hydrogen atom is quantised The correct statements are

To which of the following species, the Bohr theory is not applicable ?

Bohr's theory is applicable to

Bohr's theory is applicable to