85. A 305 mm x 457 mm four stroke single acting diesel engine is rated at 150 kW at 260 rpm. 

Fuel consumption at rated load is 0.56 kg/kW-hr with a heating value of 43,912 kJ/kg. Calculate 

the break thermal efficiency.

A. 10.53% B. 27.45% C. 14.64% D. 18.23%