The correct answer is: a) Brahmi script.
The Telugu script is an abugida script used to write the Telugu language. It is one of the oldest scripts in the world, and is believed to have evolved from the Brahmi script. The Brahmi script is a writing system that was used in ancient India, and is the ancestor of many modern scripts, including the Telugu script. The Telugu script is written from left to right, and has 56 letters. The letters are divided into vowels, consonants, and conjuncts. Vowels are letters that represent the sounds of vowels. Consonants are letters that represent the sounds of consonants. Conjuncts are combinations of consonants and vowels. The Telugu script is a beautiful and complex script, and is a vital part of the Telugu language and culture.
The other options are incorrect because:
- The Devanagari script is a writing system used to write the Hindi language. It is not the ancestor of the Telugu script.
- The Arabic script is a writing system used to write the Arabic language. It is not the ancestor of the Telugu script.
- The Roman script is a writing system used to write many languages, including English. It is not the ancestor of the Telugu script.