Explanation: In a superheterodyne receiver, the image frequency is primarily rejected in the **RF (Radio Frequency) stage**. The RF stage typically includes a tunable bandpass filter, often called a preselector, which passes the desired RF signal while attenuating unwanted signals, including the image frequency. This filtering happens *before* the signal reaches the mixer. If the image frequency were to reach the mixer, it would mix with the Local Oscillator (LO) to produce an Intermediate Frequency (IF) signal identical to the desired signal's IF. Once an image signal is converted to the IF, it becomes indistinguishable from the desired signal, and the IF stage cannot reject it. The LO only generates a mixing frequency, and the detector extracts modulation; neither stage performs frequency rejection. Therefore, filtering at the RF stage is crucial for preventing image interference.