In general aviation, what is the standard altitude limit for class G airspace?

In general aviation, Class G airspace, which is uncontrolled airspace, typically extends from the surface up to 1,200 feet above ground level (AGL) unless otherwise specified. This means that unless a specific restriction or condition is noted, pilots operate under the assumption that the upper limit of Class G airspace is 1,200 feet. This altitude is significant for visual flight rules (VFR) operations, where pilots fly based on visual references instead of relying on instrument navigation.

The other options suggest alternative altitude limits that either exceed the standard 1,200 feet or are less common under typical regulations. Class G airspace does not generally extend to 2,500 feet or 10,000 feet AGL by default, which is why these choices do not align with the established guidelines. Therefore, the correct answer effectively reflects the regulatory framework governing Class G airspace in general aviation.