In jet engine terminology, which description correctly defines a rotor?

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Multiple Choice

In jet engine terminology, which description correctly defines a rotor?

Explanation:
A rotor is the rotating part of the engine—the blades are mounted directly on a central shaft and turn with it. These blades are fixed to the spindle so they rotate as a unit, transferring energy to or from the airflow as it moves through the compressor and turbine stages. The engine casing is stationary, the fuel injector is fixed in place, and the stationary blades (stator) guide the flow without moving. So the description that matches a rotor is blades fixed on a spindle.

A rotor is the rotating part of the engine—the blades are mounted directly on a central shaft and turn with it. These blades are fixed to the spindle so they rotate as a unit, transferring energy to or from the airflow as it moves through the compressor and turbine stages. The engine casing is stationary, the fuel injector is fixed in place, and the stationary blades (stator) guide the flow without moving. So the description that matches a rotor is blades fixed on a spindle.

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