Question

Which of the following cannot be an order of a column-matrix?

Options

• 1 × 2

• 2 × 1

• 1 × 1

• m × 1, where m ∈ N

Answer 1

1 × 2

Explanation:

A column matrix has only one column and any number of rows, i.e., order m × 1. Options (B), (C), and (D) satisfy this form, but 1 × 2 is a row matrix, not a column matrix.