यदि $A = \begin{bmatrix} 2 & 2 \\ a & b \end{bmatrix}$ और $A^2 = O$ है,तो $(a, b) = $

  • A
    $(-2, -2)$
  • B
    $(2, -2)$
  • C
    $(-2, 2)$
  • D
    $(2, 2)$

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