You are given a question and two equations. Find which equation (s) is / are sufficient to answer the question.Find the value of z, if1) \(A = \left[ {\begin{array}{*{20}{c}} 1&2\\ 3&1 \end{array}} \right], B = \left[ {\begin{array}{20} 1&0\\ 0&z \end{array}} \right]\)2) AB = A

• A. Only 2 is enough
• B. Both 1 and 2 are sufficient
• C. Only 1 is enough
• D. Either 1 or 2 is enough