Option 1 -> unsullied means spotless or untarnished, which is a synonym of immaculate, not opposite.
Option 2 -> imperfect means flawed or defective, which is the opposite of immaculate (perfect/flawless).
Option 3 -> pristine means perfectly clean or in original condition, which is a synonym of immaculate, not opposite.
Option 4 -> dispassionate means unemotional or objective, which is unrelated to the meaning of immaculate.
Hence, Option 2: imperfect -> "Immaculate" means perfectly clean or without flaws, so its antonym would be "imperfect" which means having defects or not being perfect -> correct