Which of the following statement(s) is/are not true about the atmosphere ?
(1) Atmosphere is a very shallow layer of the earth
(2) More than 99% of the atmosphere is within 30 km of Earth’s surface
(3) More than 99% of the atmosphere is within 80 km of Earth’s surface
(4) It protects us from the dangerous radiation emitted by the sun
1
(1) and (2)
2
(2) and (3)
3
only (2)
4
only (3)