Will it be possible for India to be the number 1 team in the tests?

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India had a brilliant chance to be the Number 1 team in the world in ODIs, if they had won the series against the aussies, but as usual, they let the chance go and got relegated to the 3rd position in the ODI Rankings. Now India has chance to become World number 1, this time in tests. If India beat Srilanka 2-0 in this current test series, then India will be elevated to the Top test team. What do you think are the chances of India taking the top spot in the tests? Your comments and suggestions are welcome