1 . A=4321

• A. $\left[\begin{array}{cc}\frac{1}{2}& -1\\ -\frac{3}{2}& -2\end{array}\right]$
• B. $\left[\begin{array}{cc}-\frac{1}{2}& \frac{3}{2}\\ 1& -2\end{array}\right]$
• C. $\left[\begin{array}{cc}\frac{1}{2}& -\frac{3}{2}\\ -1& 2\end{array}\right]$
• D. $\left[\begin{array}{cc}-\frac{1}{2}& -1\\ \frac{3}{2}& -2\end{array}\right]$

Answer: Option B

Explanation: