The correct answer is option 4. Confusing.
The word "Lucid" describes something that is clear, easily understood, and rational. It suggests clarity of thought or expression. For example, a lucid explanation or a lucid dream is one that is clear and easily comprehensible.
The antonym of "Lucid" is "Confusing." When something is confusing, it is unclear, complex, or difficult to understand. It may lack clarity or coherence, leading to confusion or misunderstanding.
Therefore, in the context of antonyms, "Confusing" represents the opposite of "Lucid" as it describes something that is not clear or easily understood. | 
