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For interval (-1, 1) which of the follow...

For interval `(-1, 1)` which of the following statements is true?

A

`-1 in (-1, 1)`

B

`0 in (-1, 1)`

C

`(-1, 1)= (-1, 1)`

D

`(-1, 1)= {phi}`

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The correct Answer is:
B
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