Option 1, Eighth Schedule, does not deal with Autonomous District Councils. The Eighth Schedule of the Constitution of India lists the official languages of the country.

Option 2, Article 370, also does not deal with Autonomous District Councils. Article 370 grants a special status to the state of Jammu and Kashmir.

Option 3, Sixth Schedule, is the correct answer. The Sixth Schedule of the Constitution of India deals with Autonomous District Councils. It provides for the administration of tribal areas in Assam, Meghalaya, Tripura, and Mizoram, and establishes Autonomous District Councils in these areas. These district councils have powers to make laws on a wide range of subjects, including land, forests, and local government.

Option 4, Article 250, also does not deal with Autonomous District Councils. Article 250 of the Constitution of India allows the Parliament to legislate on matters in the State List in the interest of the whole country during emergencies.

In summary, the correct answer is Option 3, Sixth Schedule, which deals with Autonomous District Councils in certain tribal areas of Assam, Meghalaya, Tripura, and Mizoram.