An object is located at a height of 18 km from the surface of earth. The object is located in:
Below are distances of different layers of Atmosphere from Earth:
Exosphere: It ranges from 700 to 10,000 km (440 to 6,200 miles)
Thermosphere: It ranges from 80 to 700 km (50 to 440 miles)
Mesosphere: It ranges from 50 to 80 km (31 to 50 miles)
Stratosphere: It ranges from 12 to 50 km (7 to 31 miles)
Troposphere: It ranges from 0 to 12 km (0 to 7 miles)
So the correct option is A