Which one of the following was the primary assembly in the Chola village administration?

(c) Ur was the primary village assembly in the Chola village administration. Every village was a selfgoverning unit. A number of such villages constituted a Korram in different parts of the country. Taniyur was a large village big enough to be a Kurram by itself. A number of Kurrams constituted a Valanadu. Several Valanadus made up one Mandalam, a province. At the height of the Chola empire, there were eight or nine of these provinces including Sri Lanka. These divisions and names underwent constant changes throughout the Chola period.