If f(x) = [2 + 5|n| sin x], where n in I...

If `f(x) = [2 + 5|n| sin x]`, where `n in I` has exactly 9 points of non-derivability in `(0, pi)`, then possible values of n are (where [x] dentoes greatest integer function)

A

`+- 3`

B

`+- 2`

C

`+- 1`

D

None of these

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The correct Answer is:

C

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