If ${x^2} + 2ax + 10 - 3a > 0$ for all $x \in R$, then

  • [IIT 2004]
  • A

    $ - 5 < a < 2$

  • B

    $a < - 5$

  • C

    $a > 5$

  • D

    $2 < a < 5$

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