Correct Answer: Swift

Solution : The correct answer is the third option.

"Sluggish" refers to a lack of energy, slow movement, or a general state of inertia. It can describe something slow to respond, lethargic, or lacking in activity or speed. "Swift" is the correct antonym for "sluggish". "Swift" is an adjective that means moving or capable of moving with great speed or velocity. It describes something rapid, quick, or fast in its movement or action.

The meanings of the other options are as follows:

• Abnormal refers to something that deviates from normal.
• Utterly means completely or totally.
• Slow means taking more time than usual, or not moving, happening, or acting quickly.

Therefore, the correct answer is swift.