The correct answer is option 'D' - All of the above.

The Constitution of India is a comprehensive document that not only lays down the fundamental principles of governance but also contains detailed administrative provisions. These provisions can be found in various parts of the Constitution.

1. Fifth and Sixth Schedule:
The Fifth and Sixth Schedules of the Constitution deal with the administration and governance of tribal areas in India. They contain detailed provisions regarding the administration of Scheduled Areas (Fifth Schedule) and Tribal Areas (Sixth Schedule). These provisions include the establishment of autonomous district councils, the powers and functions of these councils, the protection of tribal rights, and the safeguarding of tribal customs and traditions. The administrative provisions in these schedules ensure the effective governance and protection of the tribal population.

2. Center-State relations:
The Constitution of India outlines the distribution of powers between the central government and the state governments. It contains detailed administrative provisions regarding the relationship between the center and the states. These provisions include the division of subjects into three lists - Union List, State List, and Concurrent List, which specify the areas of governance that are exclusively under the purview of the central government, state governments, or both. The Constitution also provides for the establishment of inter-state councils, which facilitate coordination and cooperation between the center and the states in matters of common interest. These administrative provisions ensure a harmonious relationship between the center and the states and promote effective governance.

3. Appointment and functions of several constitutional bodies:
The Constitution of India establishes various constitutional bodies to ensure the smooth functioning of the government and protect the rights of the citizens. These bodies include the Election Commission, the Union Public Service Commission, the State Public Service Commissions, the Comptroller and Auditor General, the Attorney General, etc. The Constitution contains detailed administrative provisions regarding the appointment, powers, functions, and independence of these bodies. These provisions ensure the impartiality, efficiency, and accountability of these constitutional bodies in carrying out their respective roles.

In conclusion, the Constitution of India not only lays down the fundamental principles of governance but also contains detailed administrative provisions. These provisions can be found in the Fifth and Sixth Schedules, the provisions related to center-state relations, and the provisions regarding the appointment and functions of several constitutional bodies. These administrative provisions ensure effective governance, protection of tribal rights, cooperative federalism, and the smooth functioning of the government.