Error spotting (exam direction): Identify the erroneous part (A/B/C) — choose D if there is no error — 'Twice twelve / makes / twenty-four / No error.'

Given sentence parts (A–D)
A. Twice twelveB. makesC. twenty-fourD. No error.

Concept/Approach (equivalence vs. production verb)
When expressing mathematical identity/equivalence, the copular verb 'is' is preferred: 'Twice twelve is twenty-four.' The verb 'make/makes' is used in additive constructions like 'Two and two make four' or for causation/production.

Step-by-Step correction
1) Recognise identity statement: 'A equals B'.2) Replace verb of production with copula: 'makes' → 'is'.3) Correct sentence: 'Twice twelve is twenty-four.'

Verification/Alternative
Comparable forms: 'Three times five is fifteen'; contrast with 'Two and two make four'.

Common pitfalls
Overgeneralising 'make(s)' to all arithmetic statements.

Final Answer
B — 'makes' should be 'is'.