You are the IT professional who work in an International company named Wiikigo. You are experienced in troubleshooting operating systems and applications that are not working correctly, identifying code defects and so on. You have enough knowledge on windows internals and you provide technical support for the company. According to the company requirement, an application is created by you. You must make sure that the application is able to use the CreateFile function to read from COM port 10. Of the following device name, which one should you open?

A.
You should open “\\COM10”

B.
You should open “\\\\.\\COM10”

C.
You should open “COM10”

D.
You should open “%COM10%”