Answer:
Gupta Empire.
Step-by-step explanation:
The Gupta Empire was one of the empires established in India and was in existence during the late 3rd century CE. The period was also known as the Golden Age of the Indian empire for the different developments and innovative discoveries during this period.
The numbering system as well as the concept of zero were invented by Aryabhatta, an Indian astronomer, during this period. Many other advancements such as the discovery of the different planets, the calculations of the solar and lunar eclipses, the approximate value of pi, negative numbers, calculation of square roots, etc were also seen during this period.
Thus, the correct answer is the Gupta empire.