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Let `z=((1+i)^(2))/(a-i),(agt0)` and `|z|=sqrt((2)/(5))` then z is equal to

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Let `z=((1+i)^(2))/(a-i),(agt0)` and `|z|=sqrt((2)/(5))` then z is equal to
A. `-(1)/(5)-(3i)/(5)`
B. `(1)/(5)+(3i)/(5)`
C. `(3)/(5)-(1)/(5)i`
D. `-(3)/(5)+(i)/(5)`
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Correct Answer - A
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