Step 1: Contextual Analysis. The inquiry concerns phonetic features of Kokborok and Dimasa, both members of the Tripuri language family. Specifically, it focuses on the phonemic relationship between Kokborok /t/ and Dimasa /k/. Step 2: Phonetic Pattern Identification. Within Kokborok and Dimasa, the Kokborok phoneme /t/ corresponds to the Dimasa phoneme /k/. The correct pattern among the given choices is /kh/ to /g/, indicating aspiration and a subsequent consonant alteration. Step 3: Resolution. Therefore, the accurate answer is (3) /kh/ tei /g/, accurately depicting the phonetic transition between these languages.