Which of the following is/are not indicators of renal function?

The correct choice highlights an important distinction in the evaluation of renal function. Blood, urea nitrogen (BUN) level, creatinine clearance, and peak transit time are all specific indicators used to assess how well the kidneys are functioning.

BUN is a measure of nitrogen in the blood that comes from the waste product urea, which is produced when protein is metabolized. Elevated levels may indicate impaired renal function, among other conditions. Creatinine clearance provides a more direct measurement of kidney function by assessing how well creatinine is filtered from the blood through the kidneys. Peak transit time, which measures the time it takes for a substance to pass through the kidney, can also provide information regarding renal function and might indicate obstruction or impairment in kidney drainage.

In contrast, a complete blood count (CBC) primarily evaluates overall health and can provide information on various conditions, such as anemia and infections, but it does not specifically measure kidney function or provide insights directly related to renal performance. Therefore, it is not an indicator of renal function per se.