The correct answer is: B. A receiver.
A pager is a small, portable device that receives short messages, typically from a central system. The messages are usually text, but can also include images or sounds. Pagers are used by a variety of people, including doctors, nurses, and emergency workers.
A transmitter is a device that sends out signals. A receiver is a device that receives signals. A transceiver is a device that can both send and receive signals. An equalizer is a device that adjusts the levels of different frequencies in a signal.
In a paging system, the transmitter is used to send out the paging signals. The receiver is used to receive the paging signals. The pager is the receiver in the paging system.