From the following line diagram and p-h chart, what is the power required in terms of the mass of refrigerant flowing in the condenser i.e., m2?

• A. m2 (h1 – h2) / 60
• B. m2 (h1 – h4) / 60
• C. m2 (h2 – h1) / 60
• D. m2 (h1’ – hf4’) / 60