In single quotes, backslashes are literal except for \' and \. The string 'a\b\n' contains: 'a', literal backslash, 'b', literal backslash, 'n'. When printed, this shows as 'a\b\n' - the \ is one backslash, and \n is two characters (backslash + n), not a newline character. Option A incorrectly interprets \n as a newline.