Spectral line would not ne seen for a `2p_x - 2p_z` transition
p-orbitals are degenerate orbitals.

2p orbitals have :

2p orbitals have :

2p orbitals have :

2p orbitals have :

Transition of electron between p_x and p_y would not lead to an spectral line. p-orbitals are degenerate orbitals.

Assertion : Aspectral line will be seen for a 2p_(x)-2p_(y) transition. Reason : Energy is released in the form of waves of light when the electron drops from 2p_(x) to 2p_(y) orbital.

In a given n, p-orbitals are --- fold degenerate