Correct representation of water potential of a cell is:

• A

  ${\mathrm{\psi }}_{\mathrm{s}}$ + ${\mathrm{\psi }}_{\mathrm{w}}$

• B

  ${\mathrm{\psi }}_{\mathrm{s}}$ + OP

• C

  ${\mathrm{\psi }}_{\mathrm{p}}$ + ${\mathrm{\psi }}_{\mathrm{w}}$

• D

  ${\mathrm{\psi }}_{\mathrm{s}}$ + ${\mathrm{\psi }}_{\mathrm{p}}$