Step 1: Understanding the Concept:
This question asks for the antonym of the word FICTITIOUS.
Step 2: Detailed Explanation:
Definition of FICTITIOUS: Imaginary, invented, or not real. It is the root of the word "fiction."
Analyzing the Options:
- (A) classical: Relating to ancient Greek or Latin literature, art, or culture. Unrelated.
- (B) natural: Existing in or derived from nature; not made or caused by humankind. While related to "real," it is not the most direct opposite.
- (C) factual: Concerned with what is actually the case; based on facts. This is the direct opposite of something that is invented or imaginary.
- (D) rational: Based on or in accordance with reason or logic. Unrelated.
- (E) commonplace: Not unusual; ordinary. Unrelated.
Step 3: Final Answer:
The direct antonym for FICTITIOUS (not real) is FACTUAL (based on fact, real).