Final answer:
The true statement regarding unstained sediment examination is that large numbers of transitional cells are often seen after catheterization.
Step-by-step explanation:
Among the options provided regarding the examination of unstained sediment, the true statement is: B. Large numbers of transitional cells are often seen after catheterization. Transitional cells are epithelial cells from the urinary system that can appear in urine after procedures such as catheterization. Unstained sediment examination is not reliably accurate for differentiating renal cells from white blood cells (WBCs), and red blood cells (RBCs) from nonbudding yeast may also be challenging to distinguish. Although neoplastic cells are not commonly found in urinary sediment, it is not accurate to say they are never found, as they may indeed appear in cases of bladder cancer.