For $m > 1, n > 1$,the value of $c$ for which the Rolle's theorem is applicable for the function $f(x) = x^{2m-1}(a-x)^{2n}$ in $(0, a)$ is

  • A
    $\frac{2am-1}{m+2n-1}$
  • B
    $\frac{a(m-n+1)}{2m+2n}$
  • C
    $\frac{a(2m-1)}{2m+2n-1}$
  • D
    $\frac{a(2m+1)}{m+n-1}$

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