Correct option is C
The relationship between Odisha and Odia is that Odia is the language spoken in the state of Odisha.
Now, we need to find the option where the language corresponds to the state in a similar way:
Karnataka → Kannada
Tamil Nadu → Tamil
Kerala → Malayalam
Andhra Pradesh → Telugu
The correct answer is (c) Kerala, as Malayalam is the language spoken in Kerala, just like Odia is spoken in Odisha.