Which type of fluent aphasia involves smooth, effortless speech but poor comprehension?

Wernicke's aphasia is characterized by fluent, effortless speech that often lacks meaningful content and is produced with normal prosody. Individuals with this type of aphasia may talk in long, rambling sentences that can include nonsensical words or phrases. While they may not be aware of their issues, their comprehension of language is significantly impaired. This combination of fluent speech and poor understanding makes Wernicke's aphasia distinct from other types.

In contrast, transcortical motor aphasia involves non-fluent speech with relatively preserved comprehension, while anomic aphasia features fluent speech but significant word-finding difficulties. Conduction aphasia presents with fluent speech as well, but individuals have difficulty with repetition and may have better comprehension than those with Wernicke's aphasia. Thus, Wernicke's aphasia is the only choice that accurately fits the description of having smooth, effortless speech paired with poor comprehension.