Aplane is an undefined term because it
can be named using three noncollinear points
is described generally, not using a formal definition
is where other geometric shapes can be constructed
is a flat surface that extends indefinitely in all directions

In geometry,we can define plane as a flat surface with no thickness.The surface extends with no ends.A plane does not have any edges even if we draw it on paper with edges,it does't mean it has edges.
Hence,
The best answer is Option B.

A plane is an undefined term because it is described generally, not using a formal definition.