The energy associated with each orbit as we move away from the nucleus.

The correct option is C increases
Each orbit of an atom has certain amount of energy associated with it. The energy of an orbit increases as we move away from the nucleus.
The energy of $L$ orbit is higher than energy associated with $K$ orbit. An electron needs energy to move from a lower orbit to a higher orbit. An electron releases energy, when it moves from a higher orbit to a lower orbit.