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: Transformers can also be used for isolation, where the voltage in equals the voltage out, with separate coils not electrically bonded to one another. B: Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications. C: It was discovered in 1831. D: A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another. Correct Answer DCBA The correct answer is option 2) i.e. DCBA. D is the first sentence because it introduces the subject - transformer. It also briefly explains what it does. C will follow D as C mentions the transformer's date of discovery, i.e. when the transformer was discovered. B cites the most common usage of this device. Whereas, A also mentions its usage but with the use of the word 'also'. So, A would follow B. Thus, the correct arrangement is : DCBA.