E4D05 - Amateur Extra Class

E4D05 : What transmitter frequencies would create an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?
A 146.34 MHz and 146.61 MHz
B 146.88 MHz and 146.34 MHz
C 146.10 MHz and 147.30 MHz
D 146.30 MHz and 146.90 MHz
Correct Answer: 146.34 MHz and 146.61 MHz