What transponder code should be used for VFR flight?

In the context of VFR (Visual Flight Rules) flight, the appropriate transponder code to use is 1200. This code is designated for general VFR operations and is a standard identifier that helps air traffic control and other aircraft recognize that you are flying under visual flight rules, rather than being in a special category such as IFR (Instrument Flight Rules) or in an emergency situation.

When flying VFR, the transponder code of 7500 indicates a hijacking or unlawful interference, while 7600 is used to signal loss of communication. The 7700 code is specifically reserved for declaring an emergency. None of these codes would be appropriate for standard VFR flight operations, making 1200 the correct choice for pilots operating under VFR conditions.