The main difference in DPD and `Psi_(W)` is
A. DPD has negative and `Psi_(W)` has positive value.
B. DPD depends on concentration of solvent wheras `Psi_(W)` on concentration of solute.
C. The direction of movement is from low DPD to high DPD but in `Psi_(W)` it is from high `Psi_(W)` to low `Psi_(W)` .
D. All of the above .