A flywheel is fitted to the crank shaft of an engine having W amount of indicated work per revolution. Permissible limits of coefficient of fluctuation of energy and speed are CE and CS respectively. The kinetic energy of the flywheel is given by

• A. \(2\frac{{W \cdot {C_E}}}{{{C_S}}}\)
• B. \(\frac{{W \cdot {C_E}}}{{{2C_S}}}\)
• C. \(\frac{{W \cdot {C_E}}}{{{C_S}}}\)
• D. \(\frac{{W \cdot {C_s}}}{{{2C_E}}}\)