$\begin{bmatrix} 2 & 4 & 1 & 4 & 2 \ -1 & -2 & 3 & 5 & 1 \ 3 & 1 & 2 & 3 & 6 \end{bmatrix}$ is a matrix of the order:

1. 3 × 4

2. 5 × 3

3. 3 × 5

4. none of these

If matrix A of order 2 × 1 and matrix B of order 2 × 2 are added, then the order of the matrix A + B is:

1. 2 × 2

2. 2 × 1

3. 1 × 2

4. A + B is not possible

If A = $\begin{bmatrix} 4 & 2 \ -3 & -9 \end{bmatrix}$, then the value of (-3)A is:

1. $\begin{bmatrix} -8 & -4 \ 6 & 18 \end{bmatrix}$

2. $\begin{bmatrix} -12 & -6 \ 9 & 18 \end{bmatrix}$

3. $\begin{bmatrix} -12 & -6 \ 9 & 27 \end{bmatrix}$

4. $\begin{bmatrix} -12 & 6 \ 9 & -27 \end{bmatrix}$

If A = $\begin{bmatrix} 3 & 2 \ 4 & 1 \end{bmatrix}$ and B = $\begin{bmatrix} 5 & 0 \ 3 & 2 \end{bmatrix}$, then (3A + 2B) is equal to:

1. $\begin{bmatrix} 19 & 6 \ 18 & 7 \end{bmatrix}$

2. $\begin{bmatrix} 8 & 2 \ 7 & 3 \end{bmatrix}$

3. $\begin{bmatrix} 19 & 16 \ 18 & 17 \end{bmatrix}$

4. $\begin{bmatrix} 9 & 16 \ 8 & 17 \end{bmatrix}$