A pressure stage of a gas turbine compressor consists of which of the following?

Correct Answer: Option B — A set of rotor blades and a set of stator blades.

A single pressure stage in an axial-flow compressor comprises one row of rotating rotor blades followed by one row of stationary stator blades. The rotor adds kinetic energy to the air, while the stator converts that velocity into pressure, completing the energy transformation required for each stage of compression.