Explanation:

- Option 1: Surat - Surat already has an operational airport and there are ongoing plans for expansion, but no new greenfield airport development is planned.

- Option 2: Dholera - Dholera is set to have a new greenfield airport, aimed at boosting connectivity and economic development. .

- Option 3: Navi Mumbai - Navi Mumbai is also pegged for a new greenfield airport, which is in the development phase to relieve congestion at Mumbai’s current airport.

- Option 4: Noida - A new greenfield airport, Jewar Airport, is under development in Noida, intended to serve the NCR region.

- Option 5: Varanasi - Varanasi currently has a functional airport with expansion plans, but no new greenfield project is planned there.