Prakash, who was the first Indian to break the 2 minute barrier in the 200m butterfly, clocked 01:59.35 to win the gold.
Team mate Supriyo Mondal won the silver in 02:03.42 while Manoj Mitesh, representing Services, won bronze with a time of 02:07.04, according to release.
Prakash had clocked 1:59.27 at the Hong Kong Open in this event this year which was better than today's timing.
But the result sheet of the Championships said that it was a national record. According to records at the Swimming Federation of India also, Prakash's effort today was a national record.
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