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An elements has three isotopes X^(20), X...

An elements has three isotopes `X^(20), X^(21)` and `X^(22)`. Percentage abundance (mole %) of `X^(20)` is 90 and average atomic mass of X is `20.18`. Select correct option (s) -

A

Percent abundance of `X^(21) = 8%`

B

Percent abundance of `X^(21) = 2%`

C

Percent abundance of `X^(22) = 8%`

D

Percent abundance of `X^(22) = 2%`

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