If airplane B has 280 degrees set in the course selector, which instrument will correspond to those VOR indications?

When an aircraft has a course selector set to 280 degrees, it is focused on a specific radial from a VOR (VHF Omni-directional Range) station, and the corresponding radial indicates the direction from which the aircraft is flying with respect to that station.

In this case, when airplane B has a course selector set to 280 degrees, the instrument that would reflect a heading or navigation preparation aligned with that course typically corresponds to the selected VOR indicator, indicating the relationship between the aircraft's heading and the VOR's radial.

The correct answer, indicating the proper instrument that aligns with this course selector setting, represents the specific VOR instrument that would display the relevant information for navigating towards the 280-degree radial. The choice reflects a fundamental concept in aviation navigation, which is understanding how to interpret VOR signals in conjunction with the aircraft's heading and course settings.

The other choices possibly relate to other course selectors that do not accurately reflect the corresponding indications for a 280-degree course, as they either represent different radials or are associated with separate navigational settings. Understanding the function and operation of VOR instruments is critical in this context, allowing pilots to effectively track their desired navigation path.