What was one of India's most significant achievements during the classical era?

One of India's most significant achievements during the classical era was the development of a sophisticated system of mathematics and astronomy. Indian mathematicians, including Aryabhata, introduced concepts such as zero as a numeral and the decimal system, which laid the groundwork for modern mathematics. Additionally, advancements in astronomy, like the heliocentric model proposed by Aryabhata, showcased India's intellectual prowess and contributed to global scientific knowledge. This era also saw the flourishing of art, literature, and philosophy, further enriching India's cultural heritage.