Question: When will DFS for input graph G create a spanning tree for G ? When will DFS for input graph G create a spanning tree

When will DFS for input graph G create a spanning tree for G?
When will DFS for input graph G create a spanning tree for G?
Always.
Only if G is a forest.
If G has at least n-1 edges, where n is the number of vertices.
Iff G is non-empty and connected.

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