Step 1 — Read the sentence carefully:
"A great literary or artistic work is known as ______."
The blank clearly refers to a term used for the most important or greatest creation of an artist, writer, or thinker.
Step 2 — Identify the correct word:
The expression magnum opus is a Latin phrase that literally means "great work." It is used to describe the most important or celebrated achievement of an individual, especially in literature, art, or scholarship.
Step 3 — Fit the word into the sentence:
"A great literary or artistic work is known as magnum opus." This fits perfectly and conveys the intended meaning.
Step 4 — Conclusion:
Thus, the correct substitution for the blank is magnum opus.
Final Answer:
The correct option is (D) : magnum opus.