Dispute between/ among the States inter se comes under the jurisdiction of both the High Courts and the Supreme Court.

Explanation:
Dispute between/ among the States inter se refers to conflicts or disagreements that arise between two or more states within the country. These disputes can be related to various issues, such as territorial disputes, water disputes, boundary conflicts, or any other matter that involves multiple states.

Jurisdiction of the High Courts:
- Each state in India has its own High Court, which has the jurisdiction to hear cases within the territorial boundaries of that state.
- In case of a dispute between/ among the States inter se, the High Court of the state where the dispute has originated has the jurisdiction to hear and decide the matter.
- The High Court has the power to interpret and apply the laws relevant to the dispute, ensuring that justice is served.

Jurisdiction of the Supreme Court:
- The Supreme Court is the highest judicial authority in India and has the power of both original and appellate jurisdiction.
- In case of a dispute between/ among the States inter se, the Supreme Court has the jurisdiction to hear and decide the matter, regardless of the state where the dispute has originated.
- The Supreme Court has the power to interpret and apply the Constitution, ensuring that the fundamental principles and rights enshrined in the Constitution are upheld.
- The Supreme Court also acts as the guardian of the Constitution, ensuring that the rights and privileges of the states are protected and any violations are addressed.

Importance of the Jurisdiction:
- Disputes between/ among the States inter se can have significant implications for inter-state relations, governance, and public welfare.
- By having both the High Courts and the Supreme Court vested with the jurisdiction to hear such disputes, a system of checks and balances is maintained.
- The High Courts provide immediate access to justice for disputes that arise within the territorial boundaries of a state, while the Supreme Court ensures uniformity in the interpretation and application of laws across the country.
- The jurisdiction of both the High Courts and the Supreme Court in such cases ensures that the states have a fair platform to resolve their differences and that the principles of federalism and constitutional rights are upheld.