The clip went viral and many wondered whether MS Dhoni was taking the ball as a memento for his "last match".
The sides will now contest a five-match Test series, which begins at Edgbaston on August 1, before games at Lord's (August 9), Trent Bridge (August 18), The Ageas Bowl (August 30) and The Oval (September 7).
Root's 100 not out was his second successive unbeaten century, helping England win the series 2-1, after he started the India tour with innings of 0, 9 and 3. Victory in this series represents a significant step for this England side, given the calibre of India's one-day outfit.
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Rashid claimed the prize scalp of India captain Virat Kohli for 71 with a classic delivery that pitched on leg and turned sharply to hit off stump.
Dhoni had come under fire following his 59-ball 37-run knock in the second ODI of the series at Lord's. "I don't know why the margins are so big, maybe it's just two really good teams and when they are on top the quality really comes through", he added. He wants the ball all the time. India had a fine start, they won the 1st ODI but lost the 2nd.
Root was named man-of-the-series but the man-of-the-match award went to county colleague Rashid after the leg-spinner took three wickets for 49 runs in his 10 overs. After reaching his 13th ton in ODIs, surpassing Marcus Trescothick's record for England, with a pulled four from the final ball of the chase, Root dropped his bat in MC style; but despite England Cricket tweeting approvingly, his team-mates were less impressed with such a sign-off.