The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called__________________?

Pick up wrong statement ?
A. mass flow rate
B. pressure ratio
C. change in load
D. stagnation pressure at the outlet
E. all of the above

A. low
B. high
C. same
D. low/high depending on make and type
E. unpredictable

A. is self-operating at zero flight speed
B. is not self-operating at zero^flight speed
C. requires no air for its operation
D. produces a jet consisting of plasma
E. none of the above

A. larger air handling ability per unit frontal area
B. higher pressure ratio per stage
C. aerofoil blades are used
D. higher average velocities
E. none of the above