Option A is not a characteristic of bureaucracy. Hence, option A. is incorrect.
Option B: It is a responsibility of both the Centre and State to strengthen the structure of federalism. Hence, option B. is incorrect.
Option C: Bureaucracy can contribute towards facilitating economic growth by implementing the policies better, but their main task remains implementing rules and policies, and not facilitating political stability. Hence, option C. is incorrect.
Option D: Bureaucrats play a major role in the public administration and are required by the elected government to implement and keep a check on the effective working of the policies. Hence, optionD. Is correct.