Concept:'Eminent' means famous, respected, or outstanding. Its antonym is a word that means not well-known or unknown.
Explanation:'Eminent' describes a person who is highly regarded and prominent in their field.
'Obscure' means not famous, unclear, or difficult to understand. It is the direct opposite of 'eminent'.
The other options are all synonyms of 'eminent': 'Prominent', 'Celebrated', and 'Distinguished' all mean famous or respected.
Therefore, the correct antonym is 'obscure'.
Answer:D. Obscure