The given sentence has been broken up into three different parts. The error, if any, will be in any one part of the sentence. Select the option which contains the part of the sentence which has an error (spelling, grammatical or contextual). If there is no error, choose option D. Not only has the Prime Minister (A) / made a good decision of implementing a lockdown, but increased (B) / the motivation of the citizens. (C) / No error (D)

The given sentence has been broken up into three different parts. The error, if any, will be in any one part of the sentence. Select the option which contains the part of the sentence which has an error (spelling, grammatical or contextual). If there is no error, choose option D. Not only has the Prime Minister (A) / made a good decision of implementing a lockdown, but increased (B) / the motivation of the citizens. (C) / No error (D) Correct Answer B

The correct answer is B

Key Points

• 'but also increased' should be there in place of 'but increased'.
• 'Not only....but also' are correlative conjunctions that always occur in pairs and it is used for emphasizing the fact that there is something more to add.
• When using not only . . . but also in a sentence, parallelism should be the goal. It means that the words following both parts of this correlative conjunction (i.e., not only and but also) should belong to the same parts of speech. For example, if a verb follows not only, then a verb should also follow but also. Using different parts of speech after each part of not only . . . but also makes the sentence imbalanced and, frankly, just awkward. Consider the examples below:
  He’s not only intelligent but also has a great sense of humor. (wrong)
  He’s not only intelligent but also funny. (right)
   

Correct sentence: Not only has the Prime Minister made a good decision of implementing a lockdown, but also increased the motivation of the citizens.