If the congugate of (x+iy)(1-2i) be 1+i,...

If the congugate of `(x+iy)(1-2i)` be 1+i, then

A

`x+iy = 1-i`

B

`x+iy = frac{1-i}{1-2i}`

C

`x-iy = frac{1-i}{1+2i}`

D

`x-iy = frac{1-i}{1+i}`

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