The correct option is A refined
The word 'boorish' refers to being rough and bad mannered.
Option A, refined refers to being elegant and cultured in appearance and manner.
Option B, funny refers to something causing laughter and amusement.
Option C, eccentric refers to something unconventional and slightly strange.
Option D, friendly refers to being kind and pleasant.
Thus, according to the meaning, the word 'refined' is the opposite of the word 'boorish'.