A uniformly charged infinite plane sheet of charge density $2 × 10^{-8}\, C\, m^{-2}$ is held in air. What will be the separation between two equipotential surfaces in the region of electric field produced by the sheet, if the potential difference between them is 10 V? (Take the value of the permittivity of free space = $8.85 × 10^{-12} C^2 N^{-1} m^{-2}$)

8.85 mm

The correct answer is Option (3) → 8.85 mm