Which "state-major language" pairing is INCORRECTLY matched?

The incorrect pairing is Kerala – Kannada. Malayalam, not Kannada, is Kerala's official language. Malayalam is widely spoken throughout Kerala and belongs to the Dravidian language family. Kannada is primarily spoken in the neighboring state of Karnataka. All other pairings are correct: Meitei (also called Manipuri) is the predominant language in Manipur; Khasi is one of Meghalaya's major languages along with Garo; and Telugu is Andhra Pradesh's official language and one of the major Dravidian languages.