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Prem notched up his 13th first-class hundred on the opening day against Goa.
The young Kerala opener talks about his approach to the game and goals ahead.
Bengal's Abhimanyu Easwaran will lead India A against Bangladesh A in the two four-day matches.
Kerala overhauled the target of 202 in just 24.4 overs.
Rohan's 101-ball knock contained 17 fours and four sixes.
Kerala began their campaign in the T20 tournament with a thumping 10-wicket win.
South Zone trail by 375 runs with four wickets in hand and a full day's play remaining.
The opener brought up his fourth first-class hundred in just his sixth innings since debut off 172 balls.
The two Kerala players are part of the 15-member squad that will be led by Hanuma Vihari.
The final match in Alappuzha was abandoned due to rains on Wednesday.
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