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The set of all values of 'a' for which t...

The set of all values of 'a' for which the expression `(ax^(2)+2x-3)/(2x-3x^(2)+a)` assumes all real values for real vales of x, is

A

[2, 3]

B

`R-(2, 3)`

C

`phi`

D

`[1, 5]`

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The correct Answer is:
C
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