In the lower part of the stratosphere, there is a layer of a gas called ……………(a) oxygen (b) ozone (c) nitrogen

In the lower part of the stratosphere, there is a layer of a gas calle

1.	In the lower part of the stratosphere, there is a layer of a gas called ……………(a) oxygen (b) ozone (c) nitrogen
Answer» Correct option is (b) ozone