The sixth term of an $A.P.$ is equal to $2$, the value of the common difference of the $A.P.$ which makes the product ${a_1}{a_4}{a_5}$ least is given by

  • A

    $x = \frac{8}{5}$

  • B

    $x = \frac{5}{4}$

  • C

    $x = 2/3$

  • D

    None of these

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