What transponder equipment is required for airplane operations within Class B airspace?

In Class B airspace, the transponder requirement is to have equipment that is equipped with a 4096 code capability, which allows for precise identification of aircraft on radar. Additionally, it must have Mode C capability, meaning it can transmit altitude information to air traffic control, enabling safe separation from other aircraft and providing the necessary data for effective traffic management within this busy airspace. The combination of 4096 code and Mode C capability ensures that aircraft can be accurately tracked and identified, which is essential for maintaining safety in environments where air traffic is dense and fast-moving.

This requirement helps in minimizing the risk of mid-air collisions and improving the efficiency of operations within Class B airspace, which is typically found around major airports where a significant volume of air traffic is present. Each of the other choices presented does not encompass the full scope of transponder requirements established for Class B operations.