If power developed by a turbine in a certain steam power plant is 1200kW. Heat supplied to boiler is 3360 kJ/kg. The heat rejected by the system to cooling water is 2520 kJ/kg, and feed pump work required to condensate back into boiler is 6kW, then the mass rate of flow through the cycle will be
(A) 1.421 kg/s (B) 14.21 kg/s
(C) 0.1421 kg/s (D) 0.01421 kg/s