Final answer:
The N2 compressor drives the accessory gear box, which in turn drives the power turbine in an aircraft engine.
Step-by-step explanation:
The N2 compressor drives the accessory gear box in an aircraft engine. The accessory gear box is responsible for transferring mechanical power from the N2 compressor to different components within the engine. In this case, the accessory gear box drives the power turbine, which is connected to the engine's shaft and plays a crucial role in producing thrust.
This configuration is commonly found in aircraft gas turbine engines, where the N2 compressor drives the accessory gearbox through a shaft. The accessory gearbox then distributes power to other components, such as the power turbine, which drives the engine's fan and power-generating systems.
The correct answer, based on the given options, is option c) Power turbine.