Which of the following are true regarding ionosphere?
I. It is the uppermost layer of atmosphere
II. The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become ionized
III. This layer is responsible for reflecting back the radio wave transmitted from the earth

A. I and II

B. I and II

C. II and III

D. I, II and III

Answer: Option C

Solution(By Examveda Team)

The following that are true regarding ionosphere are The molecules and atoms of nitrogen and oxygen in this layer absorb a part of solar radiation and become ionized and This layer is responsible for reflecting back the radio wave transmitted from the earth.