Explanation:

- The Atal Mission for Rejuvenation and Urban Transformation (AMRUT) scheme is an initiative aimed at improving urban infrastructure and services.

- The financial sharing for the AMRUT scheme varies based on the size or category of the city and region.

- Option 1: 60:40 basis - Applicable to most states where the Centre shares 60% of the cost and the State covers 40%.

- Option 2: 50:50 basis - Not generally applicable under AMRUT, but might apply to specific cases or exceptions.

- Option 3: 70:30 basis - Typically applies to the North Eastern and Himalayan states.

- Option 4: 80:20 basis - Not typically used in AMRUT.

- Option 5: None of these - Not relevant for the AMRUT context.

- Correct Answer: Option 1 - 60:40 basis