Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The Bohr model is applicable to hydrogen and hydrogen-like atoms only.
Reason R: The formulation of Bohr model does not include repulsive force between electrons.
In the light of the above statements, choose the correct answer from the options given below:

Assertion A: The Bohr model is applicable to hydrogen and hydrogen-like atoms only. This is TRUE. The Bohr model works for systems with a single electron orbiting a nucleus (hydrogen, He$$^+$$, Li$$^{2+}$$, etc.).

Reason R: The formulation of the Bohr model does not include repulsive force between electrons. This is TRUE. Bohr's model considers only the attractive Coulomb force between the nucleus and a single electron. It does not account for electron-electron repulsion.

The reason R correctly explains the assertion A. The Bohr model is limited to hydrogen-like atoms precisely because it does not incorporate electron-electron repulsive interactions. For multi-electron atoms, the inter-electron repulsion makes the Bohr model inapplicable.

Hence, the correct answer is Option C.