$\frac{5i}{7+i}$ का संयुग्मी (conjugate) ज्ञात कीजिए।

  • A
    $\frac{1}{10}(1-7i)$
  • B
    $\frac{1}{10}(7i-1)$
  • C
    $\frac{1}{10}(1+7i)$
  • D
    $\frac{1}{\sqrt{50}}(1-7i)$

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