$^n{C_0} - \frac{1}{2}{\,^n}{C_1} + \frac{1}{3}{\,^n}{C_2} - ...... + {( - 1)^n}\frac{{^n{C_n}}}{{n + 1}} = $

  • A

    $n$

  • B

    $1/n$

  • C

    $\frac{1}{{n + 1}}$

  • D

    $\frac{1}{{n - 1}}$

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