If a plant cell has a solute potential of -0.5 MPa (ΨS) and a pressure potential (ΨP) of 0.2 MPa, what will be the water potential (Ψ)? 

• A. -0.3 MPa
• B. +0.3 MPa
• C. +0.7 MPa
• D. -0.7 MPa

Answer: (A)