The dual of the Boolean expression \(AB.\left( {\bar BC + AC} \right)\)is:
1
\(\left( {\bar A + \bar B} \right) + \left( {B + \bar C} \right).\;\left( {\bar A + \bar C} \right)\)
2
\(\left( {\bar A + \bar B} \right) + \left( {B\bar C + \overline {AC} } \right)\)
3
\(\left( {\bar A + \bar B} \right).\left( {B + \bar C} \right)\left( {A + \bar C} \right)\)
4
\(\left( {A + B} \right)+\left( {\bar B + C} \right).\left( {A + C} \right)\)