If \({\rm{A}} = \left[ {\begin{array}{*{20}{c}} 1&{ - 1}\\ 2&3 \end{array}} \right]{\rm{\;\;and\;B}} = \left[ {\begin{array}{*{20}{c}} 2&3\\ { - 1}&{ - 2} \end{array}} \right]\), then which of the following is/are correct?1. AB (A-1B-1) is a unit matrix2. (AB)-1 = A-1B-1Select the correct answer using the code given below:

If \({\rm{A}} = \left[ {\begin{array}{*{20}{c}} 1&{ - 1}\\ 2&3 \end{ar

1.	If \({\rm{A}} = \left[ {\begin{array}{{20}{c}} 1&{ - 1}\\ 2&3 \end{array}} \right]{\rm{\;\;and\;B}} = \left[ {\begin{array}{{20}{c}} 2&3\\ { - 1}&{ - 2} \end{array}} \right]\), then which of the following is/are correct?1. AB (A-1B-1) is a unit matrix2. (AB)-1 = A-1B-1Select the correct answer using the code given below:
A.	1 only
B.	2 only
C.	Both 1 and 2
D.	Neither 1 nor 2
Answer» E.