The range of the function f(x) = sqrt(4 ...

The range of the function f(x) = `sqrt(4 - x^(2)) + sqrt(x^(2) - 1)` is :

A

`[sqrt3,sqrt7]`

B

`[sqrt3,sqrt5]`

C

`[sqrt3,sqrt6]`

D

`[sqrt2,sqrt3]`

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The correct Answer is:

C

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