A. Dull
B. Uninteresting
C. Unusual
D. Boring

Explanation:

The word exotic means something unusual, foreign, or strikingly different from what is familiar.

In simple words: rare, different, or unusual in a fascinating way.

So, the synonym of exotic is unusual.

Real-Life Example

• She wore an exotic dress from another country.
• She wore an unusual dress from another country.

Different and attractive = Exotic