The concept of a Citizen Charter was introduced to ensure transparency and accountability in public services. The charter outlines the rights of citizens and the responsibilities of public service providers. It primarily focuses on ensuring good governance by defining the services that a government body provides, the quality of these services, the time frame for delivery, and the standards citizens can expect. The idea is to make government bodies more accountable and responsive to the public.
Step 1: The Citizen Charter aims at improving the relationship between government and citizens by making service delivery more efficient and transparent.
Step 2: The other options, such as NGO activity, development administration, and POSDCORB, are not as closely related to the concept of a citizen charter, which is specifically tied to the idea of good governance.
Final Answer:
\[
\boxed{(A) \, \text{Good governance}}
\]