A, B, C and D are four layers of atmosphere A helps in long distance radio communications. In layer B most of weather phenomena take place. The pollutants relesed from air coonditioners and aerosols deplete layer 'D' which also gets depleted by nitrous oxide. Meteorites burn up in layer C.
Identify the layers A, B, C and D, arrange them in increasing order of hight from the surface of earth.

Explanation

A = ionosphere or thermosphere, B = troposphere, C = mesosphere, D = stratosphere. Increasing order of five layers as per altitude from the surface of earth are B < D < C < A.