Rules for Error identification is a combination of all the elements that can be in Grammar.
In this we need to identify the grammatical errors in a sentence.
Though termed as Sentence Correction, most often, problems in this topic need one to only classify sentence errors.
It can be a punctuation error, wrong use of tense, subject-verb disagreement, article and many more, through which a reader’s skills are tested.
Though we can say one needs to be concerned about all grammartical concepts to solve these type of questions.