Concept:The highest grade in the Civil Service is the administrative cadre.
Explanation:The administrative cadre consists of the most senior civil servants.
They organise and coordinate the activities of ministries.
They advise ministers on policy formulation and implementation.
They also act as the link between ministers and other civil servants.
Members include directors-general, directors, deputy directors, and assistant directors.
Entry is based on university education and competitive examinations.
Answer:D. Administrative cadre