The correct answer is B. ASYNC port.
A modem is a device that converts digital signals to analog signals and vice versa, so that data can be transmitted over telephone lines. It is typically connected to a computer’s serial port, which is also known as an asynchronous port.
A parallel port is a type of port that is used to connect printers and other devices that require a lot of data to be transferred quickly. A keyboard connector is a type of port that is used to connect a keyboard to a computer. A video port is a type of port that is used to connect a monitor to a computer.
None of the above options are correct because they are not ports that can be used to connect a modem to a computer.