Which of these is not matched correctly ?

Correct option is C

Vetti and Kadamai do not refer to categories of land. Instead, Vetti was a type of forced labor that was prevalent in parts of ancient and medieval India. It often involved people being compelled to work without wages. Kadamai, on the other hand, refers to a type of land revenue system or tax. The other pairs mentioned in the options are correctly matched: Manigramam and Nanadesi were indeed guilds, Shikaste and Nastalig are styles of writing, and Muvendar and Araiyar were titles.