If f (x) = x^(2) + 1, then the value of ...

If `f (x) = x^(2) + 1,` then the value of (fof) (x) is equal to

A

1) `x ^(4) + 1`

B

2) ` x ^(4) + 2x ^(2) + 2`

C

3) `x ^(4) + x ^(2) +1`

D

4) none of these

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The correct Answer is:

B

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