Karnataka s Ridhima Veerendrakumar came up with a sensational swim in the 100m backstroke for group II girls to add another gold medal to the hosts kitty and her time of 1:04.87 also broke the national record of 1:05.30 seconds created in 2014 .
Sambhavv R of Karnataka bettered Olympian Srihari Nataraj s three-year-old national record in 200m freestyle for group I boys as the 37th Sub Junior and 47th Junior National Aquatic Championships got off to a rollicking start here at the .