In the above circuit, X is given by:
1
\(X = A {\bar B \bar C} + \overline A B\overline C + {\bar A \bar B}{C} + ABC\)
2
\(X = \overline A BC + A\overline B C + AB\overline C + \overline {ABC} \)
3
X = AB + BC + AC
4
\(X = \overline {AB} + \overline {BC} + \overline {AC} \)