On Pathos Total Semitotal and Entire Total Block Graph of a Tree

In this communication, the concept of pathos total semitotal and entire total
block graph of a tree is introduced. Its study is concentrated only on trees. We present a characterization of graphs whose pathos total semitotal block graphs are planar, maximal outerplanar, minimally nonouterplanar, nonminimally nonouterplanar, noneulerian and hamiltonian.