The standard enthalpies of formation of CO2 (g), H2O(l) and glucose(s) at 25°C are –400 kJ/mol, –300 kJ/mol and –1300 kJ/mol, respectively. The standard enthalpy of combustion per gram of glucose at 250°C is
(A) +2900 kJ
(B) – 2900 kJ
(C) –16.11 kJ
(D) +16.11 kJ