What is the primary function of a transceiver?

The primary function of a transceiver is to transmit and receive radio signals. This dual capability allows it to facilitate two-way communication, which is essential in various radio and communication systems. By combining the functions of both a transmitter and a receiver into a single device, a transceiver can send information from one point to another while also being able to receive incoming signals. This is fundamental in applications such as amateur radio, mobile communication, and wireless networks.

Other options may touch on aspects related to a transceiver's operation, such as amplification or filtering, but they do not capture the essence of a transceiver's core purpose. While amplifying signals and reducing noise can improve communication quality, these are not the primary functions of the device itself. Monitoring frequencies is typically a function of a receiver, but without the ability to transmit, it would not fulfill the complete role expected of a transceiver. Thus, option B clearly identifies the essential characteristic that defines a transceiver.