Correct Answer: Blemished

Solution : The first option is correct.

Explanation:
Impeccable means to describe something or someone without any flaws. Blemished means marked or spoiled by a flaw or by multiple flaws. It is clear that impeccable and blemished have opposite meanings.

The meanings of the other options are as follows:

• Unsullied means not tarnished or impure; clean, pure, and untainted.
• Flawless means perfect or without any imperfections; free from defects or blemishes.
• Exquisite means extremely beautiful, delicate, or finely crafted; possessing rare beauty or charm.

Therefore, the correct answer is blemished .