The pressure ratio obtained from a centrifugal
compressor is lower than that which can be obtained from the axial flow
compressor. I think the key to this question is the use of the word stage. If
you consider 1 stage of an axial compressor (rotor + stator) its pressure rise
is not that great. A number of stages are required to give high pressure
ratios.
A stage of a centrifugal compressor is its impeller and diffuser. This will
give a higher ratio than a single axial stage. The ratio produced is dependent
on speed of the impeller and its diameter.
Questions are normally asked to compare the centrifugal and axial compressors.
I do not like the wording of this question and can understand your confusion.