The correct answer is (b). The Constitution of India is the primary constitutional document governing the administration of Arunachal Pradesh. It is the supreme law of the land and all other laws must be consistent with it. The Constitution of India provides for a federal system of government, with power divided between the central government and the state governments. Arunachal Pradesh is one of the 28 states of India and is governed by a democratically elected government. The state has its own legislature, executive and judiciary. The Constitution of India also provides for fundamental rights, which are the basic rights of all citizens of India. These rights include the right to equality, the right to freedom, the right against exploitation, the right to freedom of religion, cultural and educational rights, and the right to constitutional remedies.
The other options are incorrect. The Constitution of Arunachal Pradesh is a state law, which means that it is subordinate to the Constitution of India. The North-Eastern Areas (Reorganisation) Act is an act of Parliament, which means that it is also subordinate to the Constitution of India. The Inner Line Permit Regulations are a set of rules and regulations that govern the entry of outsiders into Arunachal Pradesh. They are not a constitutional document and do not have the same status as the Constitution of India.