Several cultures used placeholders or symbols related to zero, including Mesopotamian and Maya traditions. Indian mathematicians made the decisive conceptual advance of treating zero as a number and formulating arithmetic rules; Brahmagupta’s seventh-century work is a major landmark. The source tradition places the person, work and event in a defined historical setting. Indian mathematics fits that evidence because it matches the specific chronology, agency and function contained in the question. A comparison with the alternatives is useful: Roman mathematics, Norse mathematics and Mayan astronomy alone are genuine historical terms or names, but each belongs to a different office, patron, text, region or sequence. The compact memory link is therefore Indian mathematics together with the factual context above, not the isolated option letter.