यदि $a > 0$ और $z = \frac{(1+i)^2}{a-i}$,जहाँ $i = \sqrt{-1}$,का मापांक $\frac{2}{\sqrt{5}}$ है,तो $\bar{z}$ है

  • A
    $-\frac{2}{5} - \frac{4}{5}i$
  • B
    $-\frac{2}{5} + \frac{4}{5}i$
  • C
    $\frac{2}{5} - \frac{4}{5}i$
  • D
    $\frac{2}{5} + \frac{4}{5}i$

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