Answer:
A
Explanation:
To find the product of these matrices, what we need to do is to multiply whatever we have at a specific position in the first matrix by that which we have in the same position in the other matrix.
Thus, we have the following;
(1 * -2) (3 * 1)
(-2*3). (5 * 4)
(-2) (3)
(-6). (20)
This makes option A correct