For the given figure, find out Y.
1
\({\rm{Y}} = \overline {{\rm{ABC}}} + {\rm{D}}\)
2
\({\rm{Y}} = \overline {{\rm{AB}}} + {\rm{C}} + {\rm{\bar D}}\)
3
\({\rm{Y}} = \left( {{\rm{\bar A}} + {\rm{\bar B}}} \right){\rm{C}} + {\rm{\bar D}}\)
4
\({\rm{Y}} = \left( {\overline {{\rm{A}} + {\rm{B}}} } \right){\rm{C}} + {\rm{D}}\)