If a Graph Structured Stack contains {1,2,3,4} {1,5,3,4} {1,6,7,4} and {8,9,7,4}, what would be the source and sink vertices of the DAC?

Question: If a Graph Structured Stack contains {1,2,3,4} {1,5,3,4} {1,6,7,4} and {8,9,7,4}, what would be the source and sink vertices of the DAC?

1.Source – 1, 8 Sink – 7,4

2.Source – 1 Sink – 8,4

3.Source – 1, 8 Sink – 4

4.Source – 4, Sink – 1,8


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