Who among the following led a successful military campaign against the kingdom of Srivijaya, the powerful maritime State, which ruled the Malay Peninsula, Sumatra, Java and the neighbouring islands?

States that the Rashtrakutas 'emerged as the most feared and powerful kingdom' under a series of successful rulers, establishing a pattern of expansionist and militarily capable rulers.

A student could use this pattern plus maps/chronologies to ask whether Rashtrakuta naval or overseas capability around Amoghavarsha's time matched what would be needed to reach Srivijaya.

Describes Rashtrakuta military campaigns in peninsular India (invasions of the Cholas, capture of Kanchi, Thanjavur, march to Rameshvaram), showing they conducted distant expeditions and projected power southwards.

One could extend this by checking whether those southward operations included or were accompanied by naval capability or contacts across the Bay of Bengal toward Southeast Asia.

Says Devapala (Pala) defeated Amoghavarsha and that Devapala granted villages to Balaputradeva of the Sailendra dynasty (Suvarnadipa/Sumatra), indicating political links between Indian rulers and the Sailendra/Srivijaya polity and that Indian-Pala alliances involved Sailendra.

A student could infer that if the Palas allied with Sailendra and fought Rashtrakutas, Rashtrakutas might have had adversarial links with Sailendra/Srivijaya—check diplomatic/military records for evidence of Rashtrakuta–Srivijaya confrontation.

Defines Srivijaya as a major maritime kingdom in Southeast Asia and notes that South Indian kingdoms (Pallavas, Chalukyas) had maritime trade with Southeast Asia, establishing the existence of regular sea links.

Combine this with knowledge of sea routes to see that any Indian military expedition against Srivijaya would require naval operations—so look for records of Rashtrakuta naval expeditions or cooperation with navies.

Gives an explicit example of a South Indian ruler (Chola Rajendra I) mounting a naval operation directed against Srivijaya, showing that Indian kingdoms did conduct overseas military expeditions to Srivijaya.

Use this precedent to assess plausibility: if other South Indian dynasties launched such expeditions, investigate whether Rashtrakuta chronicles similarly record any naval campaign toward Srivijaya.