Error spotting (question tags): Identify the erroneous segment (A/B/C) — mark D if there is no error — 'Sheela has scored a first class / in her final exams, / isn't it? / No error.' Match the auxiliary and subject in the tag.

Given data

• Main clause: 'Sheela has scored …' (present perfect, subject 'Sheela').

Concept/Approach: Tag formationThe tag must mirror the auxiliary and subject with opposite polarity: 'hasn't she?' not 'isn't it?'

Step-by-step correctionReplace tag: 'isn't it?' → 'hasn't she?'

Common pitfallsUsing 'isn't it?' as a default tag for all sentences.

Final AnswerC — Correct tag: 'hasn't she?'