Question

which of the following is the upermost region of atmosphere ​

Answer 1

Answer:

Exosphere.............

The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft) where it merges into the solar wind.

Answer 2

Exosphere the uppermost region of the atmosphere