The correct answer is: c) Adi group.
The Adi group is the largest language group in Arunachal Pradesh, with over 1.2 million speakers. The Adi language is spoken in the central and eastern parts of the state, and is also spoken in parts of Assam and Nagaland. The Adi language is a member of the Tani language family, which also includes the Apatani, Galo, and Nyishi languages.
The Tani language family is a branch of the Tibeto-Burman language family. The Tibeto-Burman language family is a large family of languages spoken in East Asia, South Asia, and Southeast Asia. The Tibeto-Burman language family is the second largest language family in Asia, after the Indo-Aryan language family.
The Tani language family is divided into several branches, including the Adi branch, the Apatani branch, the Galo branch, and the Nyishi branch. The Adi branch is the largest branch of the Tani language family, with over 1.2 million speakers. The Apatani branch is the second largest branch of the Tani language family, with over 500,000 speakers. The Galo branch is the third largest branch of the Tani language family, with over 300,000 speakers. The Nyishi branch is the fourth largest branch of the Tani language family, with over 200,000 speakers.
The Adi language is a tonal language, which means that the pitch of a speaker’s voice can change the meaning of a word. The Adi language is also a polysyllabic language, which means that most words have more than one syllable. The Adi language is a verb-final language, which means that the verb comes at the end of the sentence.
The Adi language is a rich and complex language with a long history. The Adi language is a vital part of the Adi culture and identity.