Error spotting (comparatives with superlative set): Identify the erroneous segment (A/B/C) — mark D if there is no error — 'Shanghai is / bigger than any city / of the world / No error.' Ensure logical comparison using 'any other' and correct preposition.

Given data

• (A) Shanghai is
• (B) bigger than any city
• (C) of the world

Concept/Approach: Avoid self-comparisonWhen comparing one member with the set it belongs to, use 'any other' to exclude the subject from the set: 'bigger than any other city'. Also prefer 'in the world' over 'of the world' for membership.

Step-by-step correction1) Insert 'other': 'bigger than any other city'.2) Adjust preposition: 'in the world'.Correct: 'Shanghai is bigger than any other city in the world.'

Common pitfallsOmitting 'other' in comparisons; using 'of' where 'in' expresses class membership.

Final AnswerB — Should read 'bigger than any other city in the world'.