ctrl, shift and alt are called ....... keys.

[ A ]    function
[ B ]    adjustment
[ C ]    alphanumeric
[ D ]    modifier right
[ E ]    None of these
Answer : Option D
Explanation :
A modifier key is a special key on computer keyboard that temporarily modifies the normal action of another key when pressed together. Alt, Shift, Ctrl are modifier keys. • Shift- gives capital letters or to access the punctuation and other symbols on the number keys and other keys. eg. Shift + A gives output capital letter A. • Ctrl- Used in combination with other keys as shortcuts for menu commands, eg. Ctrl + S activates the save command. • Alt- Works as menu - command shortcuts. eg. Alt + F4 closes the active window on the desktop.