Read each sentence to find out whether there is any grammatical mistake/error in it. The error if any will be in one part of the sentence. Mark the number of the part with error as your answer. If there is 'No error' mark(d).
`("Her relatives could not explain to us")/a` `("why did not she come for the wedding")/b` `("as she was expected")/c` `("No error")/d`.

Explanation

(b) Use .she did not. in place of .did not she.