The correct answer is: d) Western Kshatrapas.
The Western Kshatrapas were a dynasty of Saka rulers who ruled over Gujarat and parts of northwestern India from the 2nd century BCE to the 5th century CE. They were originally vassals of the Kushan Empire, but they gained independence in the 2nd century CE. The Western Kshatrapas were eventually overthrown by the Gupta Empire in the 5th century CE.
The decline of the Western Kshatrapas paved the way for Gupta influence in Gujarat. The Guptas were a powerful Indian dynasty that ruled over much of northern India from the 4th to the 6th centuries CE. They were known for their military prowess, their patronage of the arts, and their economic prosperity. The Guptas were able to extend their influence into Gujarat after the decline of the Western Kshatrapas. They built temples, forts, and other monuments in Gujarat, and they promoted trade and commerce in the region.
The other options are incorrect because they were not dynasties that ruled over Gujarat. The Indo-Greeks were a group of Greek-speaking people who ruled over parts of northwestern India from the 2nd century BCE to the 1st century CE. The Parthians were an Iranian dynasty that ruled over parts of Central Asia and northwestern India from the 3rd century BCE to the 3rd century CE. The Kushans were an Iranian dynasty that ruled over parts of Central Asia, Afghanistan, Pakistan, and northwestern India from the 1st century BCE to the 3rd century CE.