Correct representation of water potential for a solution which is at atmospheric pressure:

• A

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

• B

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

• C

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

• D

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