What are the postulates of Bohr's model of an atom?

Which one of the following is considered as the main postulate of Bohr's model of atom.

Give the postulates of Bohr's atomic model.

The Bohr model of atoms

The Bohr model of atoms

Bohr's model can explain

Bohr's model can explain

What are the limitations of Rutherford's model of the atom ?

Bohr Model

In Bohr's model of hydrogen atom ,

State the postulate of Bohr's theory regarding : (a) Angular momentum of an electron. (b) Emission of a photon.