Consider the following statements:

1.From the surface up, the layers are troposphere, stratosphere, ionosphere and exosphere

2.The troposphere is the most dynamic layer in terms of climate and weather

3.The ozone gas is present in the stratosphere only

AOnly statements 1 and 2 are true ✓ Correct

BOnly statements 2 and 3 are true

COnly statements 1 and 3 are true

DStatements 1, 2 and 3 are true

Correct answer: (A) Only statements 1 and 2 are true

Explanation

The layer order and the troposphere's dynamism are right, which fits Statements 1 and 2.

Statement 1 is accepted, as from the surface up the given sequence runs troposphere, stratosphere, ionosphere and exosphere.

Statement 2 is right, as the troposphere is the most dynamic layer for weather and climate.

Statement 3 is wrong, since ozone also occurs in the troposphere, not the stratosphere alone.

Ground-level tropospheric ozone is in fact a harmful air pollutant and greenhouse gas.

Nearly all weather events are confined to the lowest, tropospheric layer.

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