Water is fed to a boiler at 50°C, the enthalpy of vaporization at atmospheric pressure in the boiler is 2400 kJ/kg, steam coming out from the boiler is 0.7 dry, the net heat supplied in the boiler (Cp = 4 KJ/kgK).

• A. 2160 KJ/kg
• B. 1940 KJ/kg
• C. 1980 KJ/kg
• D. 1880 KJ/kg