The correct answer is B. 2f8.
COM2 is a serial port that is typically used for connecting a modem or other serial device to a computer. The I/O address for COM2 is 2f8. This means that any program that wants to communicate with COM2 must use the I/O address 2f8.
The other options are incorrect. Option A, 2vb, is the I/O address for COM1. Option C, 8f8, is the I/O address for COM3. Option D, 330, is not a valid I/O address.
I hope this helps!
