The equation $e^{4 x}+8 e^{3 x}+13 e^{2 x}-8 e^x+1=0, x \in R$ has:

  • [JEE MAIN 2023]
  • A

    two solutions and both are negative

  • B

    no solution

  • C

    four solutions two of which are negative

  • D

    two solutions and only one of them is negative

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