Veteran Mithali Raj guides India to 7-wicket win over arch-rivals.
Dhawan (92) and Rishabh (58) scored superb fifties to guide the team home in the last ball of the thrilling match.
The skipper became the first Indian woman to crack a ton in T20Is.
India crushed West Indies by 71 runs in the second T20I played at the Atal Bihari Vajpayee Ekanta Stadium in Lucknow.
High-flying India overpowered West Indies in the first T20I of the three-match series at the Eden Gardens on Sunday.
Depleted West Indies search for redemption in natural habitat.