In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C, and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Various governments have made efforts since the 1970s to reduce the release of sulfur dioxide and nitrogen oxide into the atmosphere with positive results. B: Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. C: It can have harmful effects on plants, aquatic animals, and infrastructure. D: Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions. Correct Answer DCBA The correct answer is option 1) i.e. DCBA. D is the first sentence because it introduces the subject of the passage 'acid rain' and explains it. Both B and C can be placed in the second position, but since BA would form a pair, C would follow D. B talks of 'emissions of sulfur dioxide and nitrogen oxide' and A talks of governments' efforts to reduce the release of sulfur dioxide and nitrogen oxide into the atmosphere. Therefore, A must follow B.