The correct option is D Naduvazhis, Ooralars, Karalars
Owners of devaswam land were called Ooralars. The rulers, Brahmins or the people of the temple did not directly cultivate in this land. They used to give the land for cultivation to middle men called, Karalar. According to the power hierarchy, Naduvazhis were at the top, and Ooralars and Karalars were below them.