Competing in the 85kg category of the Free Style event, Arun edged past Iran's Seyedabolfazl Hashemijouybar with a very close 7-6 scoreline to emerge champion.
Pradeep claimed the yellow metal in a dominating fashion as he overpowered Japan's Takhashi Sanshiro 6-0 in the final of the 50kg category of the Greco Roman Style.
Annu Devi settled for a silver medal after losing the 40kg female Free Style final to Korea's Mun Su Jong.
Ankush claimed a bronze in the 38kg female free style event after finishing third beind Shimizu Miu (gold) and Almaganbetova Laura (silver).