Synonyms are words which have the same or nearly the same meaning in the same language.
Antonyms are words which have opposite meaning in comparison to the other.
Option D)adroit is correct as the word adroit means clever or skilfuland the word clumsy means awkward in movement or in handling things.
Both the words are opposite of each other.
The other options are not correct as they do not have the opposite meaning to the given word.