Kolkata, Dec. 20 -- T20s are rarely one-sided, but on days when India bat like there is no tomorrow, the result can be a foregone conclusion. South Africa tried though, giving 231/5 a mighty chase riding a fifty from Quinton de Kock and some big hitting from Dewald Brevis. But the occasion and the scenario were bound to get big on them as Varun Chakravarthy took 4/53 to carve a 30-run win for India and seal the five-match series 3-1 in Ahmedabad on Friday. South Africa probably got it wrong at the toss, trusting the dew factor to choose chasing. That allowed India to unleash a carnage so brutal that it left South Africa's bowlers too dazzled to react. Wrecker-in-chief was Hardik Pandya, hammering a 25-ball 63, adding 105 runs in 44 balls fo...