ICAO is the United Nations agency for developing international air navigation principles and fostering planning and development of international civil air transport.

• A. Intergovernmental Aviation Council
• B. International Air Navigation Organization
• C. Intercontinental Civil Aviation Organization
• D. International Civil Aviation Organization

Answer: (D)

The main idea here is knowing the official name of the international body that sets global standards for air navigation and guides the planning and development of international civil air transport. The statement is describing ICAO, which is the United Nations specialized agency responsible for these tasks. Its formal title is International Civil Aviation Organization. This organization, created by the Chicago Convention in 1944, works with member states and industry to establish standards and recommended practices to ensure safety, efficiency, and harmonization in international aviation. The other options are not the actual name of the organization, so they don’t fit as the recognized title.