1 . 2×2

• A. $\left[\begin{array}{cc}3& 3\\ 4& 5\end{array}\right]$
• B. $\left[\begin{array}{cc}3& 5\\ 4& 6\end{array}\right]$
• C. $\left[\begin{array}{cc}3& 3\\ 3& 6\end{array}\right]$
• D. $\left[\begin{array}{cc}3& 5\\ 3& 4\end{array}\right]$

Answer: Option A

Explanation:

2 . 2×2

• A. $\left(\begin{array}{cc}3& 5\\ 4& 3\end{array}\right)$
• B. $\left(\begin{array}{cc}3& 5\\ 4& 6\end{array}\right)$
• C. $\left(\begin{array}{cc}4& 5\\ 3& 6\end{array}\right)$
• D. $\left(\begin{array}{cc}6& 4\\ 5& 3\end{array}\right)$

Answer: Option B

Explanation:

3 . 2×2

• A. $\left(\begin{array}{cc}1& 3\\ 3& 2\end{array}\right)$
• B. $\left(\begin{array}{cc}1& 2\\ 2& 3\end{array}\right)$
• C. $\left(\begin{array}{cc}1& 2\\ 3& 3\end{array}\right)$
• D. $\left(\begin{array}{cc}1& 3\\ 3& 1\end{array}\right)$

Answer: Option A

Explanation:

4 . 2×2

• A. $\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]$
• B. $\left[\begin{array}{cc}0& 1\\ 0& 0\end{array}\right]$
• C. $\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right]$
• D. $\left[\begin{array}{cc}1& 1\\ 1& 0\end{array}\right]$

Answer: Option C

Explanation: