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In the proportion a:b = c:d, the terms a and d are called:
AAntecedents
BMeans
CExtremes
DConsequents
Answer & Solution
Correct answer: C. Extremes
1. Per OCR: "Here the first and last quantities i.e. a & d are extremes and the two middle terms b & c are called means."
2. Cross-multiplication rule: extremes product = means product.
3. ad = bc.
_Source: ICMAI BoS CMA Foundation Paper 3 (FBMS) — Paper3_07042026.pdf, Module 1 §1.1 (page 12)_