Explanation:

- Option 1: Samudragupta

- Samudragupta was one of the most famous and powerful rulers of the Gupta Empire.

- Known for his military prowess and patronage of the arts.

- Option 2: Bimbisara

- Bimbisara was a king of the Magadha kingdom, not the Gupta Empire.

- He belonged to the Haryanka dynasty.

- Option 3: Ashoka

- Ashoka was a significant emperor of the Maurya Dynasty, not related to the Gupta line.

- Famous for his embrace of Buddhism after the Kalinga War.

- Option 4: Vishnugupta

- Vishnugupta is recognized as the last ruler of the Gupta dynasty.

- His reign marked the decline of Gupta power.

Correct Answer: Option 4 - Vishnugupta