Which one of the following statements expresses a true proportion a- 5463 b- 2112 c- 7989 D- 34912?

To determine which of the given numbers expresses a true proportion, we need additional context or criteria for what constitutes a "true proportion." Without specific information about how these numbers relate to each other or a defined proportion to evaluate, it is impossible to identify which statement is true. Please provide more details or clarify the criteria for evaluating the proportions.