Question

in which of the following neither a vertex nor an edge can be repeated?​

Answer 1

☆ Answer

These can have repeated vertices only. It is a trail in which neither vertices nor edges are repeated i.e. if we traverse a graph such that we do not repeat a vertex and nor we repeat an edge. As path is also a trail, thus it is also an open walk.

Answer 2

Answer:

Trail

Explanations

In trail neither a vertex nor an edge can be repeated