Concept:Antonyms are words with opposite meanings. 'Prominent' means important, famous, or easily noticeable. Its antonym is a word meaning not well-known or hidden.Explanation:Step 1: Understand 'prominent' – it describes something that stands out or is widely known.Step 2: Look at the options: Obscure means unknown or unclear; Renowned means famous; Eminent means respected; Conspicuous means easily seen.Step 3: Only 'obscure' gives the opposite idea – lacking fame or visibility.Thus, the opposite of 'prominent' is 'obscure'.Answer:Obscure (Option A)