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 that part with the error as your answer. If the sentence is correct as it is, mark 'No error' as your answer. (Ignore the errors of punctuation, if any)
The foremost criterion of selection we adopted/were the number of years of training/a singer had received/under a particular guru.
(a) The foremost criterion of selection we adopted
(b) were the number of years of training
(c) a singer had recived
(d) under a particular guru
(e) No error

Answer

b

Explanation

Since 'Criterion' is a singular noun, therefore, singular verb 'was' will be used.