Let $a_1, a_2, a_3, \ldots, a_n$ be positive real numbers. Then the minimum value of $\frac{a_1}{a_2}+\frac{a_2}{a_3}+\ldots+\frac{a_n}{a_1}$ is

  • A
    $1$
  • B
    $n$
  • C
    $^nC_2$
  • D
    $2$

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