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If f, g, h are functions from R to R such that `f(x) = x^(2)+1, g(x) =sqrt(x^(2)-1) AA x in R` and `h(x) = {{:(0, x le 0),(x, x ge 0):}`, then `AA x in R, ho(fog)(x)=`

A

`x^(2)`

B

0

C

`x`

D

`x^(3)`

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The correct Answer is:
A
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