Correct Answer: Prayag

Solution : Correct Answer is  Prayag

The Prayag assembly was held every five years and was a splendid illustration of Harsha's wealth and prosperity throughout the period, as well as the king's generosity of compassion.
The motivation for such gatherings was not confined to social and political objectives, but also included spiritual motivations. Harshavardhana is regarded as a devout Shiva devotee. He held numerous periodic gatherings for religious debates, activities, donations, and charities. Many monarchs, sramanas, priests, scholars, and even the poor and orphans took part in these events.