G8B11:What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?
Direct answer summary (2023-2027 NCVEC pool)
The official correct answer for G8B11 is The sum and difference.
The key fact is The sum and difference. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.