MCQ
यदि $A =\left[\begin{array}{ll}1 & 2 \\ 2 & 1\end{array}\right]$ तो सह-खंडन $A =$
- ✓$\left[\begin{array}{cc}1 & -2 \\ -2 & 1\end{array}\right]$
- B$\left[\begin{array}{ll}2 & 1 \\ 1 & 1\end{array}\right]$
- C$\left[\begin{array}{cc}1 & -2 \\ -2 & -1\end{array}\right]$
- D$\left[\begin{array}{cc}1 & -2 \\ 2 & 1\end{array}\right]$
