1 . i=-1

• A. 1
• B. -1
• C. 0
• D. i

Answer: Option C

Explanation:

2 . A=1i-i1 B=i-1-1-i

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

Answer: Option B

Explanation: