"I had done everything right in practise. And having won the 100m despite a bad start, I was confident that I could complete the double," Nithin was quoted as saying in the release.
Meanwhile, Karnataka's AT Daneshwari also completed the sprint double, winning the girls under-21 200m in 24.58 seconds.
She was, however, overshadowed by Maharashtra's Avantika Narale.
The under-17 runner, who missed out on the 100m final, scripted a run in the 200m final that was faster than Daneshwari's time by a hundredth of a second.
Another performance that raised expectations was a 19.20m shot put effort by Amandeep Singh Dhaliwal (Punjab) in the boys under-17 division.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)