The correct option is B Osmosis is the movement of solution from their lower conc. to higher conc. through SPM
Osmosis occurs spontaneously in response to a driving force. The net direction and rate of osmosis depends on both the pressure gradient and concentration gradient. In osmosis, only movement of solvent i.e., water occurs from higher concentration of water (i.e., higher ψw) to lower concentration (i.e., lower ψw). This also means that water moves from low concentration of solute (i.e., high solute potential) to high solute concentration (i.e., low solute potential). So option a, b and d are correct. b is incorrect.