Despite three bogeys in the middle of the round, Nayanika, who was joint runner-up in the tenth stage at the Prestige Golfshire in Bengaluru, shot 70, who also had five birdies.
She started the day with a birdie, ended with a birdie and in between had other wins on the fourth 11th and 13th holes.
The Gurugram-based golfer, who has been popular for the last few starts at the WPGT, has also finished fourth, sixth and seventh in three other events, apart from second place in the 10th stage.
Pranavi, who won five times in the first 12 legs, had a very stable round, which started with a bogey. She got that back on the fourth and parried the rest until she reached the 18th, where she birdied again.
Gaurika had the most birdies (7) during the day, but she also gave away four bogeys and a double bogey on the Par-4 sixth hole.
With just three players under par, Shweta Mansingh was fourth with 74, while Seher Atwal, Khushi Khanijau and Oviya Reddi had rounds of 3-over 75 each.
Rishika Muralidhar was the best amateur with 77 and she was eighth next to Sneha Singh.
Five players, including Neha Tripathi and Ridhima Dilawari, were tied for 10th with rounds of 78 each. The other three were Agrima Manral and amateurs Jasmine Shekar and Vidhatri Urs.