Roots of the equation \( x^{4}-2 x^{2}+4=0 \) forms a (A) rectangle (B) rhombus (C) square (D) p...

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Roots of the equation \( x^{4}-2 x^{2}+4=0 \) forms a
(A) rectangle
(B) rhombus
(C) square
(D) paralleleogram
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