Correct: Purchase is the formal equivalent of buy. B, C, D: These are also formal-informal pairs, but the question specifically asks for the pair in the order "formal then informal," and Purchase–Buy is the most commonly tested example. Concept: Formal vs. informal synonyms.
Correct: Purchase is the formal equivalent of buy. B, C, D: These are also formal-informal pairs, but the question specifically asks for the pair in the order "formal then informal," and Purchase–Buy is the most commonly tested example. Concept: Formal vs. informal synonyms.
