The scalar matrix is:

MCQ

A
$\begin{bmatrix} -1 & 3 \\ 2 & 4 \end{bmatrix}$
B
$\begin{bmatrix} 0 & 3 \\ 2 & 0 \end{bmatrix}$
✓
$\begin{bmatrix} 4 & 0 \\ 0 & 4 \end{bmatrix}$
D
None of these

✓

Answer

Correct option: C.

$\begin{bmatrix} 4 & 0 \\ 0 & 4 \end{bmatrix}$

A diagonalmatrixwith all its main diagonal entries equal is ascalar matrix, that is, ascalarmultiple of the identity matrix
$\therefore \begin{bmatrix} 4 &\text{amp; 0} \\ 0 &\text{amp; } 4 \end{bmatrix}$ is a scalar matrix.

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