Fig. shows four plates each of area A and separated from another by a distance d. What is the capacitance between P and Q?

• A

  $\frac{{\mathrm{\epsilon }}_0\mathrm{A}}{\mathrm{d}}$

• B

  $2\frac{{\mathrm{\epsilon }}_0\mathrm{A}}{\mathrm{d}}$

• C

  $3\frac{{\mathrm{\epsilon }}_0\mathrm{A}}{\mathrm{d}}$

• D

  $4\frac{{\mathrm{\epsilon }}_0\mathrm{A}}{\mathrm{d}}$