The correct option is D Nayaka
Rudramadevi and Prataparudra encouraged several skilled warriors
who were not from any powerful family but were very loyal to the queen
and the king. They gave them high positions and the title of Nayaka.
They were given several villages from where they could collect taxes.
These villages were called their Nayankara. Each nayaka had to
maintain a stipulated amount of army, from the income they derived
from the nayankara, for the service of the king.