If $\begin{bmatrix} p - q & 2q \ 2q + r & p + q \end{bmatrix} = \begin{bmatrix} 1 & 4 \ 9 & 5 \end{bmatrix}$, then the value of (p + q + r) is:

1. 8

2. 10

3. -5

4. -10

If $\begin{bmatrix} x + 3 & 4 \ y - 4 & x + y \end{bmatrix} = \begin{bmatrix} 5 & 4 \ 3 & 9 \end{bmatrix}$, then the values of x and y respectively are:

1. 2, 7

2. 7, 2

3. 3, 5

4. 2, -7

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 = $\begin{bmatrix} -5 & 4 \ 3 & -8 \end{bmatrix}$ and B = $\begin{bmatrix} 2 & -3 \ -1 & 4 \end{bmatrix}$, then (A – B) is:

1. $\begin{bmatrix} 7 & 7 \ -4 & 12 \end{bmatrix}$

2. $\begin{bmatrix} -7 & 7 \ 4 & -12 \end{bmatrix}$

3. $\begin{bmatrix} -7 & -7 \ 4 & 12 \end{bmatrix}$

4. $\begin{bmatrix} 3 & 1 \ 2 & -4 \end{bmatrix}$