is the matrix below in echelon form reduced echelon form or

is the matrix below in echelon form ,reduced echelon form , or neither
1 0 -5 -3
0 1 -4 -2
0 0   0 0
0 0. 0 0
A. reduced echelon form
B. echelon form
C. neither

Solution

Solution:

Since each non-zero row has a leading 1 that is down and to the right of the leading 1 in the previous row, each column with a leading 1 has no other non-zero entries, and the zero rows is at the bottom of the matrix, this matrix is in reduced row echelon form.

Answer- A