Explanation:

- Mount Everest: High altitudes like Mount Everest have extreme weather, but with snow and ice, temperature variation between day and night is often less significant.

- Chilika Lake: This coastal region has a humid, maritime climate with minimal temperature differences between day and night.

- Thar Desert: Deserts like the Thar experience extreme temperatures. The lack of humidity causes a high contrast between scorching days and cool nights.

- Andaman and Nicobar Islands: These islands have a tropical climate, with the sea moderating temperature variations between day and night.

Thar Desert is where the difference between day and night temperatures is likely to be the highest.