The correct answer is  2 only.

• Article 262(1)- Parliament may by law provide for the adjudication of any dispute or complaint with respect to the use, distribution or control of the waters of, or in, any inter-State river or river valley.
• Article 262(2)- Notwithstanding anything in this Constitution, Parliament may by law provide that neither the Supreme Court nor any other court shall exercise jurisdiction in respect of any such dispute or complaint as is referred to in clause (1) Coordination between States.
• Entry 17 of State List deals with water i.e. water supply, irrigation, canal, drainage, embankments, water storage and water power.
• Entry 56 of Union List empowers the Union Government for the regulation and development of inter-state rivers and river valleys to the extent declared by Parliament to be expedient in the public interest.

•  Enactments relating to inter-state water disputes.
  • The Inter-State Water Disputes Act, 1956
  • The River Boards Act, 1956

MAJOR INTER-STATE WATER DISPUTES