Let $v_1 =$ variance of $\{13, 1 6, 1 9, . . . . . , 103\}$ and $v_2 =$ variance of $\{20, 26, 32, . . . . . , 200\}$, then $v_1 : v_2$ is

  • A

    $1 : 2$

  • B

    $1 : 1$

  • C

    $4 : 9$

  • D

    $1 : 4$

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