To answer this question, we need to understand the context of the given information.
The fairy who suffered from "Yaanai (Elephant) - Thee (Fire)" disease, which is an eating disorder caused due to excessive desire to eat, is named Kayasandigai.
Let's go through each option to understand why it is correct or incorrect:
Option A) Arugar - This option is incorrect because Arugar is not the name of the fairy who suffered from the given disease.
Option B) Manimegala - This option is incorrect because Manimegala is not the name of the fairy who suffered from the given disease.
Option C) Kayasandigai - This option is correct because Kayasandigai is the name of the fairy who suffered from the given disease.
Option D) Sudhamathi - This option is incorrect because Sudhamathi is not the name of the fairy who suffered from the given disease.
The correct answer is Option C) Kayasandigai. This option is correct because Kayasandigai is the name of the fairy who suffered from the "Yaanai (Elephant) - Thee (Fire)" disease, an eating disorder caused due to excessive desire to eat.