Explanation: To understand the context of the question, it is essential to delve into the historical background of the Pala Dynasty and the Kamarupa Kingdom, both of which were significant powers in medieval India, particularly in the northeastern region.
The Pala Dynasty was a powerful dynasty that ruled over Bengal and parts of Bihar and Orissa from the 8th to the 12th century CE. Devapala, who ruled from approximately 810 to 850 CE, was one of the most prominent rulers of this dynasty. He expanded the Pala Empire significantly and is known for his military campaigns and administrative reforms.
The Kamarupa Kingdom, located in the northeastern part of India, including present-day Assam, was another significant power during this period. The kingdom was ruled by various dynasties, and one of the notable rulers was Hajjara Varman. He ruled during the 9th century CE, which overlaps with the reign of Devapala of the Pala Dynasty.
To identify contemporaries, it is crucial to understand the timelines of these rulers. Devapala's reign from 810 to 850 CE coincides with the period when Hajjara Varman was ruling the Kamarupa Kingdom. This overlap in their reigns makes Hajjara Varman a contemporary of Devapala.
The other options provided in the question do not have historical records that place them as contemporaries of Devapala. Salambha, Paralambha, and Van Mala Varman are not recognized rulers of the Kamarupa Kingdom or any other kingdom that would be contemporaneous with Devapala of Bengal.
In conclusion, the correct answer is Hajjara Varman, as he was a ruler of the Kamarupa Kingdom during the 9th century CE, making him a contemporary of Devapala of the Pala Dynasty in Bengal. Understanding the historical timelines and the geographical and political boundaries of these kingdoms is crucial for identifying contemporaneous rulers.