Explanation:

Only statement 3rd is correct.

The Khasi Hills Autonomous District Council (KHADC) recently flagged the “mass migration” of people from ethnic strife-torn Manipur to the State’s capital Shillong and adjoining areas.
About Autonomous District Councils (ADC)

• The Sixth Schedule provides a list of ten tribal areas in Assam (3), Meghalaya (3), Tripura (1) and Mizoram (3).

• Each of these tribal areas constitutes an autonomous district.  Each autonomous district has an Autonomous District Council (ADC). 

• Membership: ADCs have up to 30 members with a term of five years, of whom four are nominated by the governor and the remaining 26 are elected on the basis of adult franchise.

• Tenure:Term of the District Councils is for five years from the date of their constitution. 

Functions: The functions of ADCs as defined in schedule 6 of the constitution included – 

• making laws on land,

• management of forests, except reserved forests,

• appointment of traditional chiefs and headmen, 

• making rules regulating the inheritance of property, marriage, divorce, the constitution of village courts, 

• It can establish, construct or manage primary schools, dispensaries, markets, ferries, fisheries, roads and so on in the district.

• It can also make regulations for the control of money lending and trading by non-tribals. But such regulations require the assent of the governor.

Revenue source: The main Revenue Sources of ADCs, as specified in the Sixth Schedule, were:

• taxes on professions, trades, callings and employment;

• taxes on animals, vehicles and boats;

• taxes on the entry of goods into a market and sale therein, and tolls on passenger and goods carried on ferries; and

• taxes for the maintenance of school, dispensaries or roads.

Hence option 2nd is correct.