Which of the instructions should be added to the code fragment below to check whether the Ctrl key currently is pressed down? See corresponding keyboard status bits in the picture: Insert ON CapsLock ON NumLock ON ScrollLock ON Alt Down Ctrl Down LShift Down RShift Down 0000:0417 xor bx, bx mov es, bx mov al, es:0417h ; MISSING INSTRUCTION jz noCtrl Choose missing instruction to insert in the code line marked by the comment MISSING INSTRUCTION". Select one: test al, 11111011b o o xor al, 00000100b O or al, 4 O and al, 00000100b d test al, 08h