The correct answer is: A. Serial port 1.
A 25-pin female connector on the back of your computer will typically be a serial port. A serial port is a type of interface that allows two devices to communicate with each other in a serial fashion, one bit at a time. Serial ports were once commonly used to connect devices such as modems, mice, and printers to computers. However, they have largely been replaced by USB ports.
A parallel port is a type of interface that allows two devices to communicate with each other in parallel, eight bits at a time. Parallel ports were once commonly used to connect printers to computers. However, they have largely been replaced by USB ports.
A docking port is a type of interface that allows a computer to connect to a docking station. A docking station is a device that provides additional ports and features to a computer. For example, a docking station might provide additional USB ports, an Ethernet port, and a video port.
COM2 port is a serial port that is typically used to connect a modem to a computer. COM2 is the second serial port on a computer. The first serial port is typically called COM1.
None of the above is not a correct answer.