The correct answer is: D. None of the above
Gopala was the founder of the Pala dynasty, which ruled over Bengal and Bihar from the 8th to the 12th centuries. He was succeeded by his son Dharmapala, who was a powerful ruler who expanded the Pala kingdom. Dharmapala was succeeded by his son Devpala, who was also a powerful ruler. However, Devpala’s son Mahipala I was a weak ruler, and the Pala kingdom began to decline under his rule. The Pala kingdom was finally overthrown by the Sena dynasty in the 12th century.
There is no evidence that any of the Pala rulers organised a darbar in Kannauj. Kannauj was an important city in northern India, and it was the capital of several dynasties, including the Gupta dynasty and the Pratihara dynasty. However, there is no evidence that any of the Pala rulers ever ruled over Kannauj.
It is possible that the question is based on a misunderstanding of the term “darbar”. A darbar is a court or assembly of a ruler. It is possible that the question is asking which of the Pala rulers held a court in Kannauj. However, there is no evidence that any of the Pala rulers ever held a court in Kannauj.