Option d is the correct answer Brahmi is the oldest writing systems used in the Indian subcontinent and in Central Asia. The oldest manuscript of the Rig Veda is in Brahmi script which was the popularly used dialect when the language was preserved as text. Important Tips Brahmi Script It is usually written from left to right. Brahmi is an abugida, meaning that each unit is based on consonant and the vowel notation is secondary, except when the vowels commence a word. The best-known Brahmi inscriptions are the rock-cut edicts of Ashoka in North-Central India, dated 250232 BC. The script was deciphered in 1837 by James Prinsep