Which of the following is a subject under the Union List?

The correct option is Airways.

Explanation

The Seventh Schedule of the Indian Constitution distributes legislative powers between the Parliament and State Legislatures under Article 246. It classifies subjects into three lists: Union List (List I), State List (List II), and Concurrent List (List III).

Option Analysis:

• Airways is Correct: Airways fall under Entry 29 of the Union List. Subjects related to communication and transport that require uniform regulation across the country are vested with the Union Parliament.
• Liquor is Incorrect: Liquor (specifically "Intoxicating liquors, that is to say, the production, manufacture, possession, transport, purchase and sale of intoxicating liquors") is a subject under Entry 8 of the State List.
• Livestock and Animal Husbandry is Incorrect: Livestock and Animal Husbandry (preservation, protection, and improvement of stock) fall under Entry 15 of the State List.
• Public Health is Incorrect: Public Health and sanitation, hospitals, and dispensaries are listed under Entry 6 of the State List.

Key Takeaway: Subjects of national importance such as Airways, Defence, Banking, and Foreign Affairs are enumerated in the Union List, whereas subjects of local or regional importance like Public Health, Agriculture, and Police are in the State List.