In a regenerative cycle, steam with enthalpy of 3514 kJ/kg is expanded in h.p. turbine to a state corresponding to saturated enthalpy of water equal to 613 kJ/kg. If the pump work requirements in high pressure and low pressure zones are respectively 3 and 1 kJ/kg, amount of heat transferred in boiler is:

• A. 2897 kJ/kg                    
• B. 2898 kJ/kg
• C. 2904 kJ/kg                    
• D. 2905 kJ/kg