The correct option is B Mandalams, administrative
The Chola empire consisted of a group of villages called Kurrams or Tehsils. A group of Tehsils or Kurrams together formed a district called Nadu and a bunch of Nadus together formed a division called Kottam. A group of Kottams formed provinces called Mandalams. There were six mandalams within the kingdom, governed by governors chosen from members of the royal family.