It was a batting masterclass from Rohit as he remained unbeaten on 111 off 61 balls with his batting pyrotechnics.
Rohit was at his brutal best as he hit eight boundaries and seven towering sixes to propel India to the big score after being sent into bat.
Rohit and Shikhar Dhawan (43 off 41) made up for their rare failure in the first T20 in Kolkata on Sunday, stitching 123 runs off 84 balls for the opening wicket to lay the foundation for a big score.
The pitch curator predicted a low-scoring affair on an unpredictable surface at the newly-built Atal Bihari Vajpayee Stadium but Rohit and Dhawan proved things wrong and looked completely at ease from the onset, stroking the ball to all parts of the big ground.
Young pace sensation Oshane Thomas got West Indies off to a fine start with a maiden over. But the Indian openers finally broke the shackles in the fifth over when Rohit and Dhawan took Thomas to the cleaners hitting a six and two boundaries, picking up 17 runs.
It eventually opened the flood gates for India as Rohit thereafter dealt mostly in boundaries and sixes to notch up his fifty in 38 balls. The right-hander mostly preferred the straight boundaries and cleared them on both sides with consummate ease.
Rishabh Pant failed for the second consecutive time, holing out to Shimron Hetmyer at midwicket boundary off left-arm spiner Khary Pierre.
Rohit and KL Rahul then shared quickfire 62 runs for the third wicket off just 28 balls to take India close to the 200-run mark.
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