Enthalpy change involved in the oxidation of glucose is $-2880\: kJ/mol$. Twenty five percent of this energy is available for muscular work. If $100\: kJ$ of muscular work is required to walk one kilometer, what is the maximum distance that a person will be able to walk after eating $120g$ of glucose.

Question

$\begin {array} {1 1} (A)\;10.8\: km & \quad (B)\;5.4\: km \\ (C)\;4.8\: km & \quad (D)\;3.2\: km \end {array}$