Step 1: Understanding the Question:
We must find the synonym or nearest meaning for the word "PERNICIOUS" from the given options.
We will break down the exact meaning of the word and compare it with the choices.
Step 2: Detailed Explanation:
The word "PERNICIOUS" is an adjective that describes something that has a highly harmful or destructive effect, especially in a gradual or subtle way.
For example, "The pernicious effects of the disease slowly destroyed his immune system without him knowing."
Let us analyze Option (A) "scientific".
Scientific means based on or characterized by the methods and principles of science. This is completely unrelated to destruction.
Let us analyze Option (B) "baneful".
Baneful is an adjective that means productive of destruction or woe, seriously harmful, or poisonous.
Since both "pernicious" and "baneful" refer to something that causes ruin, harm, or death, they are direct synonyms.
Let us analyze Option (C) "negative".
While pernicious things are indeed negative, the word "negative" is far too broad and lacks the specific intensity of destruction or severe harm implied by pernicious.
Let us analyze Option (D) "radical".
Radical means relating to the fundamental nature of something, or advocating for thorough or complete political or social change. It does not imply harm.
Let us analyze Option (E) "sturdy".
Sturdy means strongly and solidly built, which is unrelated to causing harm.
Therefore, "baneful" is the correct synonym.