Assertion (A): Public Administration is both field of activity and a field of systematic study.
Reason (R): The evolution of Public Administration as a specialised field of study falls into a number of critical stages.

A. A and R are true and R is the correct explanation of A

B. A and R are true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

Answer: Option B