Which of the following is the correct command to execute the file in the situation that an attacker has hidden badfile.exe in the readme.txt file?

“Start the executable badfile.exe that is hidden in the readme.txt file,” states the command start readme.txt:badfile.exe. In other versions of this question, the bad person might build a link and execute it by merely inputting the link's name (for example, mklink innocent.exe readme.txt:badfile.exe would create a link and the bad file could be executed simply by typing innocent).