Correct Answer: Refined

Solution : The second option is correct.

Inchoate: It is often used to describe things that are in the initial or rudimentary stages of existence.

Refined: Showing sophistication, culture, polish, or improvement in manners or taste. They are antonyms, representing opposite ends of the spectrum in terms of elegance and sophistication.

The meanings of the other options are:

Artless: Lacking art, skill, or knowledge; natural, without guile or deception.

Articulate: It is more commonly used in the first sense to describe effective and clear communication.

Formless: It suggests a lack of structure, organization, or definite boundaries.

Therefore, the correct answer will be refined.