Statement (A) is correct because the ozone layer in the stratosphere absorbs most of the sun's harmful ultraviolet-B (UV-B) radiation. Statement (R) is correct as a significant thinning of the ozone layer, often called the ozone hole, was discovered and is most pronounced over Antarctica during the spring months.
Direction to the following two questions (Q. Nos. 29 & 30). Read the two statements Assertion (A) & Reason (R). Choose the correct answer from the four choices (a), (b), (c) or (d) as given below : Statement-I (A) : Ozone layer protects the earth from excessive quantities of severely damaging Solar radiation. Statement-II (R) : Ozone hole has been discovered over the Continent of Antarctica.
Asked in KPSC KAS Prelims 2014 · Topic: Ozone Layer (Ecological Significance: Absorption of Ultraviolet (UV) Radiation)
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Answer: B. Both (A) and (R) are correct, but (R) does not explain (A).
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