What is the emission designation for VHF-FM?

The emission designation for VHF-FM is indeed F3E. This designation provides specific information about the type of modulation used and the type of signal being transmitted. In this case, "F" denotes the use of frequency modulation, which is integral to VHF-FM communication.

The "3" in F3E indicates that the signal has a bandwidth of 3 kHz. The "E" signifies that the signal is an intelligence or data signal that includes information in a single channel of voice or data where the audio is modulated.

This designation is critical for understanding radio communications, as it helps operators identify the nature of the transmissions they might be using or encountering. The rest of the choices, while representing other types of emissions, do not pertain specifically to VHF-FM, making them unsuitable for this context.