Explanation:

- Aryabhata was a renowned Indian mathematician and astronomer who lived in the 5th century CE.

- He is known for authoring the astronomical treatise, Aryabhatiya.

- The Gupta Empire, during which Aryabhata thrived, was a time of great cultural and scientific advancements.

- Option 1: Skandragupta

- Skandragupta was a Gupta emperor.

- Not specifically associated with Aryabhata.

- Option 2: Chandragupta Maurya

- He established the Maurya Empire in the 4th century BCE, much earlier than Aryabhata's time.

- Not relevant to Aryabhata's period.

- Option 3: Chandragupta 2

- Also known as Chandragupta Vikramaditya, ruled during the Gupta Empire.

- The time aligns with Aryabhata's life period.

- Correct association.

- Option 4: Harsh Vardhana

- He was a 7th-century ruler.

- Governed after Aryabhata's time.