Understanding the Question:
We need a pair of words that fits into the blank so it has the same link as "Exacerbate : Mitigate".
Key Formula or Approach:
Find what "Exacerbate" and "Mitigate" mean on their own, write down the link between them in plain words, then test each option against that same link.
"Exacerbate" = to make something worse.
"Mitigate" = to make something less severe.
So the link is: word 1 means "worsen", word 2 means "lessen".
Detailed Explanation:
Option (A) Aggravate : Alleviate. "Aggravate" = worsen, "Alleviate" = lessen. This keeps the same link.
Option (B) Alleviate : Precipitate. "Alleviate" = lessen, which is already the wrong sense for word 1 (should be worsen). Fails at the first word itself.
Option (C) Aggravate : Precipitate. Word 1 is fine ("Aggravate" = worsen), but "Precipitate" means to bring on an event fast, not to lessen anything. Fails at the second word.
Option (D) Emancipate : Exonerate. Both words mean "to free or clear from something", so this pair means nearly the same thing on both sides, not a worsen and lessen pair at all.
Since only option (A) keeps both halves of the worsen-to-lessen link, it is the one that matches.
Final Answer:
The correct pair is Aggravate : Alleviate.
\[ \boxed{\text{Aggravate : Alleviate}} \]