Read each sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The alphabet corresponding to that part is your answer. If there is 'No error', the answer is ( e ). (Ignore errors of punctuation, if any.)
Needless to say, (A)/ no sooner were all these large and rather expensive operations finished (B)/ when the main electricity was bronght in (C)/ and the turbine became obsolete. (D)/ No Error (E)

Options

A. A
B. B
C. C
D. D

Answer

C

Explanation

In the third part of the sentence, "when" will be replaced by "than" because 'No sooner' is always followed by 'than' and 'Hardly/Scarcely' is followed by' when/before'. Hence, option (c) will be the correct answer.