Option 1: Antiquated -> This is a synonym meaning old-fashioned or outdated, not an antonym.
Option 2: Archaic -> This is also a synonym meaning extremely old or no longer in use, not an antonym.
Option 3: Current -> This means modern, up-to-date, or belonging to the present time, which is the opposite of obsolete.
Option 4: Absolute -> This means complete or total, which is unrelated to the temporal meaning of obsolete.
Hence, Option 3: Current -> An antonym expresses the opposite meaning. Since "obsolete" means outdated or no longer in use, "current" (meaning modern or presently in use) is the correct antonym. -> correct