Concept:All modern Indian scripts trace their origin to a single ancient script called Brahmi.Explanation:The Brahmi script is the earliest known writing system in India after the Indus Valley script.It is the mother script from which most Indian scripts, such as Devanagari, Tamil, and Bengali, evolved over time.Many scripts in Southeast Asia and East Asia also derive from Brahmi.Thus, most modern Indian scripts have developed directly from Brahmi.Answer:A. Brahmi