1.

Statement I : Photochemical smog is also known as oxidizing smog. Statement II : Photochemical smog is chiefly composed of O_(3) , PAN, etc.

Answer»

Both STATEMENT I and statement II are TRUE and statement II EXPLAINS statement I
Both statement I and statement II are true but statement II does not explain statement I
Statement I is true but statement II is false
Both statement I and II are false.

Answer :A


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