Explanation:

A program flowchart is a graphical representation of an algorithm or a process, showing the steps as boxes of various kinds (e.g., process, decision, input/output) and their order by connecting them with arrows. It is a visual tool used in programming to plan and illustrate the sequence of operations and decisions involved in solving a problem. Option (a) program flowchart is the standard and correct term for this graphic presentation. Options (b) step chart, (c) rule diagram, and (d) program graph are not standard or precise terms for this specific concept in computer science.