The iron pillar situated at Mehrauli, Delhi is belonged to which of the following Gupta
ruler?

Correct option is D

The correct answer is (d)  Chandragupta II
 The iron pillar of Delhi is a structure 7.21 metres (23 feet 8 inches) high with a 41-centimetre (16 in) diameter that was constructed by Chandragupta II.
 Sri Gupta is considered the founder of the Gupta Empire, which was established around the early 4th century CE in northern India.
 Chandragupta II, also known by his title Vikramaditya, as well as Chandragupta Vikramaditya, was the third ruler of the Gupta Empire in India, and was one of the most powerful emperors of the Gupta dynasty. Chandragupta continued the expansionist policy of his father Samudragupta, mainly through military conquest.
 Samudragupta was the second emperor of the Gupta Empire of ancient India, and is regarded among the greatest rulers of India. As a son of the Gupta emperor Chandragupta I and the Licchavi princess Kumaradevi, he greatly expanded his dynasty's political and military power.
 Kumaragupta was the Gupta Empire's emperor in Ancient India. He appears to have maintained control of his inherited territory, which stretched from Gujarat in the west to the Bengal region in the east, as the son of Gupta emperor Chandragupta II and queen Dhruvadevi.
 Skandagupta was a Gupta Emperor from northern India. Skandagupta was the son of Gupta emperor Kumaragupta I. He ascended to the throne in 455 AD and reigned until 467 AD. Skandagupta demonstrated his ability to rule by defeating Pushyamitras during his early years in power, earning the title of Vikramaditya.