Select the most appropriate SYNONYM of the given word.

GARRULOUS

Prattling 

The correct answer is option 3. Prattling.

The most appropriate synonym for "garrulous" out of your options is Prattling.

Garrulous describes someone who talks excessively, often in a tedious or annoying way.

Prattling implies talking foolishly or at length about unimportant things, which closely aligns with the meaning of garrulous.

Verbose means using more words than necessary, but doesn't necessarily imply the annoying aspect of garrulous.

Dwindle means to decrease in size or amount, which is the opposite of talking excessively.

Adjure means to urge or command solemnly, not related to talking excessively.

Therefore, "prattling" best captures the sense of excessive and often pointless talking that "garrulous" conveys.