Explanation:

- Scheduled Tribes (STs):

- The Constitution provides for the reservation of seats in the Lok Sabha and State Legislative Assemblies for Scheduled Tribes.

- This is to ensure adequate political representation for STs.

- Option 1 is correct.

- Other Backward Classes (OBCs):

- The Constitution does not expressly provide for reservation of seats in Lok Sabha or State Assemblies for OBCs.

- OBCs have other forms of reservation, mainly in education and government jobs.

- Option 2 is incorrect.

- Differently Abled:

- There is no constitutional provision for reservation of seats for differently abled people in legislatures.

- Their representation is supported through other means.

- Option 3 is incorrect.

- Women:

- There is currently no constitutional reservation in Lok Sabha or State Assemblies exclusively for women.

- Proposals and discussions have been ongoing, but no provision as of now.

- Option 4 is incorrect.