Ans:
We know that from definitions of various types of Matrices
Row Matrix =
A matrix is said to be a row matrix if it has only one row.
Column Matrix =
A matrix is said to be a column matrix if it has only one column.
Null Matrix =
A matrix is said to be a zero matrix or a null matrix if all its elements are zero.
Square Matrix =
A matrix in which the number of rows is equal to the number of columns is said to be a square matrix.