Question

The given sentence is divided into four parts. Read the given sentence to find out whether there are any grammatical/contextual error in it. The error if any will be in two parts of the sentence. Select the option which includes those parts from the sentence. If no part in the sentence has an error, then mark 'no error' as your answer. The field-work based approach that the economists (

Q: Answer-The given sentence is divided into four parts. Read the given sentence to find out whether there are...

The error is in part B and D of the sentence. In part B use of haveplural auxiliary verb is incorrect and needs to be replaced by singular auxiliary verb has in have revolutionised as the sentence talks about a single approach. In option D use of relevantly more is contextually incorrect and needs to be replaced by more relevant which suggests that field-work based approach has made economics more relevant in policy making. Hence, the answer is option b.