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If a,b,c,d inRR are such that a^2+b^2=4 ...

If `a,b,c,d inRR` are such that `a^2+b^2=4 and c^2+d^2=2` and if `(a+ib)^2=(c+id)^2(x+iy)" then " x^2+y^2=`

A

4

B

3

C

2

D

1

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