India beat South Africa by a mammoth innings and 137 runs to take an unassailable 2-0 lead in the series.
India now lead the World Test Championship with 160 points from three games.
South African skipper Quinton de Kock's knock of 79* off 52 balls guided the Proteas to a 9-wicket win.
India cruised to a 7 wicket win with 6 balls to spare in the 2nd T20 international at Mohali.
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