Option 1: This option states that both statements are true and that Statement II is the correct explanation of Statement I. It means that ozone is indeed produced naturally by the action of ultraviolet radiation on oxygen molecules in the upper atmosphere, and the release of chlorofluorocarbons (CFCs) into the atmosphere has caused ozone depletion. This option is incorrect as it states that Statement II is the correct explanation of Statement I, but it doesn`t provide any further explanation or connection between the two statements.

Option 2: This option states that both statements are individually true but Statement II is not the correct explanation of Statement I. It means that ozone is indeed produced naturally by the action of ultraviolet radiation on oxygen molecules in the upper atmosphere, and ozone depletion has been caused by the release of CFCs into the atmosphere. This option is correct as it acknowledges the truthfulness of both statements while also recognizing that Statement II is not a direct explanation of Statement I.

Option 3: This option states that Statement I is true but Statement II is false. This option is incorrect because it asserts that Statement II is false, which is not accurate. Ozone depletion has indeed been caused by the release of CFCs into the atmosphere.

Option 4: This