(b) The correct chronological order is:
Chandragupta-I, Samudragupta, Chandragupta-II, Skandagupta
Ghatotkacha (C. 280–319) CE, had a son named Chandragupta. In a breakthrough deal, Chandragupta was married to Kumaradevi, a Lichchhavi—the main power in Magadha. With a dowry of the kingdom of Magadha (capital Pataliputra) and an alliance with the Lichchhavis, Chandragupta set about expanding his power, conquering much of Magadha, Prayaga and Saketa.Samduragupta was not only a warrior but also a great patron of art and literature. The important scholars present in his court were Harishena, Vasubandhu and Asanga. Chandragupta II, the Sun of Power (Vikramaditya), ruled until 413. He married his daughter Prabhavatigupta to Rudrasena II, the Vakataka king of Deccan, and gained a valuable ally. Skandagupta is generally considered the last of the great rulers. He defeated the Pushyamitra threat, but then was faced with invading Hephthalites or “White Huns”, known in India as Indo-Hephthalites or Hunas, from the northwest. He repulsed a Huna ** C. 455. But the expense of the wars drained the empire’ resources and contributed to its decline. Skandagupta *** in 467 and was succeeded by his son Narasimhagupta Baladitya.
