The correct option is B.
A gas turbine engine is an internal combustion engine in which the combustion of a fuel occur in a section called combustion chamber. The working fluid in gas turbine is air. Fresh air enter the engine through the compressor; the fresh air and the injected fuel meet at the combustion chamber where the fuel oil is mixed with the appropriate amount of compressed air, thus producing heat [thermal energy]. The thermal energy is used to perform mechanical work in the engine. The exhaust gas will be pass out of the engine via turbine.
