When four 1s are taken as a group on a Karnaugh map, the number of variables eliminated from the output expression is ________.

When four 1s are taken as a group on a Karnaugh map, the number of var

1.	When four 1s are taken as a group on a Karnaugh map, the number of variables eliminated from the output expression is ________.
A.	1
B.	2
C.	3
D.	4
Answer» C. 3