What is 1/(1+√2) + 1/(√2+√3) + 1/(√3+√4) + ... + 1/(√2020+√2021) equal to?

1. A.√2020 + √2021 - 1
2. B.√2021 - 1✓ Correct
3. C.√2020 + 1
4. D.√2021 + 1

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