👉 Apolar, also known as a polar graph, is a type of graph where one or more vertices are connected to each other but do not form any closed loops. In other words, an apolar graph has no internal nodes that can be connected to every other vertex. A common example of an apolar graph is the Petersen graph, which is a 5-regular graph with 10 vertices and 20 edges. Each vertex is connected to all but two of its neighbors,