If `A=[(2,-1,3),( -4,5 ,1)]` and `B=[(2 ,3 ),( 4,-2),( 1 ,5)]` , then only `A B` is defined (b) only `B A` is defined (c) `A B` and `B A` both are defined (d) `A B` and `B A` both are not defined

Explanation

To determine which matrix multiplications are defined for the given matrices \( A \) and \( B \), we first need to identify the dimensions of each matrix.

1. **Identify the dimensions of matrix \( A \)**:
- Matrix \( A \) is given as:
\[
A = \begin{pmatrix}
2 & -1 & 3 \\
-4 & 5 & 1
...