What are dangerous goods?

• A. Articles or substances that pose a risk to health, safety, property or the environment when transported by air.
• B. Items that are harmless during transport.
• C. Only explosives and gases.
• D. Things that are allowed without restrictions.

Answer: (A)

Dangerous goods are substances or articles that could pose a risk to health, safety, property or the environment when transported by air. This definition captures why special rules exist: in flight, leaks, fires, or chemical reactions can quickly become life-threatening or cause major damage, so items are classified, packaged, labeled, documented, and handled with care. The other statements don’t fit because something that’s harmless during transport isn’t dangerous, dangerous goods include far more than just explosives and gases, and nothing is allowed without restrictions—these items require compliance with specific regulations and handling procedures.