Which of the following is NOT a characteristic of air transport?

It is used extensively to transport liquids and gases.

The correct answer is Option (3) → It is used extensively to transport liquids and gases.

• It is the fastest means of transportation. Correct. Air transport is the quickest way to travel long distances.

• It is preferred by passengers for long-distance travel. Correct. People prefer airways for quick long-distance journeys.

• It is used extensively to transport liquids and gases. Not correct. Liquids and gases are usually transported through pipelines or ships, not extensively by air.

• It is often the only means to reach inaccessible areas. Correct. Air transport is essential in remote or mountainous regions.