The correct option is C WP
OP stands for osmotic pressure and TP stands for turgor pressure. The TP is equal and opposite in direction to Wall Pressure or WP, as per Newton's law. Turgor pressure is the pressure exerted by cell cytoplasm on the cell wall and Wall pressure is the pressure exerted by Cell wall on cell cytoplasm. Wall will exert pressure on cytoplasm only if cytoplasm exerts pressure on wall. Further wall will exert only that much pressure as the cytoplasm will exert on wall.