The equivalent evaporation (kg/hr) of a boiler producing 2000kg/hr. of steam with enthalpy content of 2426 kJ/kg from feed water at temp, $$40^\circ C$$ (liquid enthalpy = 168 kJ/kg; enthalpy of vaporization of water at $$100^\circ C$$ = 2258 kJ/kg) is:

A

1649

B

2000

C

2149

D

1682