The 'Romaka' and 'Paulisha' Siddhantas summarised by Varahamihira indicate —
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Correct (C): 'Romaka' (Rome) and 'Paulisha' (often linked to Paulus of Alexandria) show Indian astronomers knew and used Hellenistic methods — while Aryabhata's school advanced beyond them. Why others wrong: (A) Chinese influence is not represented in these siddhantas; (D) Persia was a transit route rather than the source here; (B) the very names disprove isolation.
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The dynasty was founded by Sri Gupta around the early fourth century CE, but it gained real political strength under Chandragupta I, who laid the foundation for a powerful north Indian empire.
This era saw remarkable achievements in science, mathematics, literature, art, and architecture happening together under stable and prosperous rule, which is why historians label it a golden age.
Chandragupta II, also known as Vikramaditya, expanded the empire further and patronised scholars like Kalidasa, making his court a centre of literary and cultural brilliance.
Aryabhata's work on the concept of zero, place-value notation, and calculations related to pi and the earth's rotation are among the most significant contributions of this period.
Repeated Huna invasions combined with the administrative strain of governing a vast territory led to the empire's gradual fragmentation by the early sixth century.