The correct answer is: A) Badaga
Badaga is a Dravidian language spoken by the Badaga people of the Nilgiri Hills in the Indian state of Tamil Nadu. It is closely related to Kannada, but it has its own distinct script, the Tigalari script.
Sanketi is a dialect of Kannada spoken in the Sanketi region of the Indian state of Karnataka. It is not a separate language, but it is distinct from standard Kannada in its pronunciation, vocabulary, and grammar.
Tulu is a Dravidian language spoken by the Tulu people of the Tulu Nadu region of the Indian state of Karnataka. It is not a dialect of Kannada, but it is closely related to Kannada and Badaga.
Kodava is a Dravidian language spoken by the Kodava people of the Kodagu region of the Indian state of Karnataka. It is not a dialect of Kannada, but it is closely related to Kannada and Badaga.
The Tigalari script is a Brahmic script used to write the Badaga language. It is derived from the Kannada script, but it has its own distinct features. The Tigalari script is written from left to right, and it has 52 letters, including 16 vowels and 36 consonants.