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$If f (x) = \{\begin{array}{l} x, x is rational \\ 1 - x, x is irrational \end{array}, then f (f (x)) is$

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x∀x∈R

x,x is irrational 1−x,x is rational

x,x is rational 1−x,x is irrational

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Correct option is A

f(f(x))=f(x),f(x) is rational 1−f(x),f(x) is irrational =x,x is rational 1−(1−x)=x, x is irrational

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If f(x)=x,x is rational 1−x,x is irrational , then f(f(x)) is

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$If f (x) = \{\begin{array}{l} x, x is rational \\ 1 - x, x is irrational \end{array}, then f (f (x)) is$