In each of these questions, a sentence with two words/group of words in ital is given. One of them or both may have certain error; You have to find out the correct word or group of words from among the three choices (A), (B) and (C) given which can replace the wrong word group of words to make the sentence as it is, mark (E).i.e., NCR(No Correction Required) as your answer.
Our employees are so careful in their work that none has been so far found any error in their work.
A. very careful… have so far found
B. so careful…. has so far around
C. so efficient… have so far found
So careful and so efficient are both correct in this context. In the original sentence, present participle tense is used which is incorrect. None is singular and hence requires has. Answer B is correct.
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