Which of the following airspaces is not contained within Class G airspace?

Class G airspace, often referred to as uncontrolled airspace, extends from the surface up to a designated altitude, typically 1,200 feet above ground level, or higher in certain situations. However, it does not include any controlled airspace above it.

Class A airspace begins at 18,000 feet MSL (Mean Sea Level) and extends up to 60,000 feet MSL. It is exclusively for instruments flight rules (IFR) operations, and all operations within this airspace require an air traffic control clearance. This altitude range is far above the typical altitude where Class G airspace operates, making Class A airspace distinct and separate from Class G.

In contrast, Class B and Class C airspaces are both controlled airspaces that typically start from the surface or other low altitudes and extend upward to specified altitudes. Thus, they share altitude ranges with Class G airspace below the transitions to those classifications.

Recognizing that Class G cannot contain Class A airspace reinforces the understanding of airspace structure and the importance of controlled versus uncontrolled environments for safe aviation operations.